UItableView reuseIdentifier = nil

最新推荐文章于 2023-06-10 13:27:28 发布
原创 最新推荐文章于 2023-06-10 13:27:28 发布 · 697 阅读 · 0 ·
CC 4.0 BY-SA版权
版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
文章标签：

#ios #uitableview #reuseIdentifier nil

本文详细解析了一位编程新手遇到的疑惑，即在初始化方法中调用特定方法导致程序崩溃的原因。通过实例分析，解释了UITableViewCell的初始化过程，并探讨了苹果为何在init方法内调用特定方法，揭示了背后的逻辑和潜在的编程陷阱。

昨天晚上写代码的时候迷迷糊糊，运行突然程序 crash了，瞬间清醒了，xcode告诉我

我去。。。。这是什么错呢？看了一圈，看到了reuseIdentifier==nil,这是怎么回事呢，设断点检查了一下，发现reuseIdentifier的值有啊，传过来了，再往下看self = [super init];平常都不是这么写的，由于迷糊，写成了这样，就改了一下，改成了这样

self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]；在运行，发现好了，但是想不明白的是，为什么会crash呢？难道是UITableViewCell 的init方法里面调用了initWithStyle:style reuseIdentifier:reuseIdentifier方法，于是写了个分类测试了一下，果然不错，确实调用了这个方法，但是让我想不明白得是，苹果为什么会在init方法里，调用这个方法呢??难道是不想让我们用init方法吗？当然了，这个错误原因只是我的猜测，具体是什么原因，我也不清楚

yan520521
关注
UITableView初识之分组显示数据Demo
myscratch的博客
06-13 1202
UITableView显示分组数据
UITableView中Cell重用机制导致内容重复的解决方法
08-30
if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; } // ...其他代码 } ``` 方法 2：通过为每个 Cell 指定不同的重用标识符...
小知识五、Cell reuseIdentifier用自己类做重用标识
weixin_34409357的博客
12-13 269
import Foundation import UIKit protocol ViewNameReusable:class { } extension ViewNameReusable where Self: UIView { static var reuseIdentifier: String { return String(describing: self) ...
[iOS]关于TableViewCell的理解以及reuseIdentifier的意义
汪海的实验室
07-19 1万+
在使用TableView的时候，下面一段代码是必须的，也是最标准的： [cpp] view plaincopyprint? - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
IOS - (id)initWithStyle... 方法的使用
weixin_30294709的博客
03-21 352
// 该方法只有在通过代码创建控件的时候才会调用, 如果控件是通过xib或者storyboard创建出来的不会调用该方法- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{ self = [super initWithStyle:style reuseIdent...
iOS开发——内存优化
syh96123的博客
06-29 495
前言： 当app经过一段儿时间的迭代，往往会出现一些性能问题，这时能够协助开发解决这些性能问题也成为我们测试的重要工作。凑巧最近一段时间就一直在协助开发去进行app内存优化。这里整理了一份关于内存优化的心得分享给大家。 目的： 首先我们先要明确我们的目的，在保证程序运行流畅的前提下尽可能的优化使用内存。所以千万不要掉进为了优化而优化的陷阱。程序要先保证能运行,然后再谈良好运转。所以解决问题比较宽泛，必要的时候在交互或者运转机制上小动刀子来保证既能完成任务，程序又能正常运转，不必去对代码进行完全重构。毕竟在优
UI学习之——cell的复用与自定义cell
m0_73348697的博客
06-10 887
认识reuseIdentifier：reuseIdentifier是iOS开发中UITableView和UICollectionView中的一个属性。它用于标识和重用UITableViewCell和UICollectionViewCell。在滚动列表时，当一个cell离开屏幕时，它的reuseIdentifier会被系统重新标记并添加到可重用的队列中，当需要新的cell时，系统会从可重用的队列中取出一个相同reuseIdentifier的cell并进行重用，从而提高性能。
好好检查一下，另外我在发给你父类的m文件参考 @interface TPBCommonTableController () < TPBTableCommonInputDelegate, TPBTableListInputDelegate > @property (nonatomic, assign) UITableViewStyle tableViewStyle; @property (nonatomic, strong) UIView *tpbSearchBarPlaceholderView; @property (nonatomic, strong) TPBTableSearchHeader *tpbInnerSearchBar; @property (nonatomic, strong) TPBEmptyView *emptyView; @property (nonatomic, strong) TPKeyboardAvoidingTableView *tableView; @property (nonatomic, strong) MASConstraint *emptyCenterYConstraint; @property (nonatomic, strong) MASConstraint *searchBarTopConstraint; @property (nonatomic, strong) MASConstraint *searchBarHeightConstraint; @end @implementation TPBCommonTableController - (instancetype)init { if (@available(iOS 13.0, *)) { return [self initWithTableViewStyle:UITableViewStyleInsetGrouped]; } else { return [self initWithTableViewStyle:UITableViewStyleGrouped]; } } - (instancetype)initWithTableViewStyle:(UITableViewStyle)style { if (self = [super initWithNibName:nil bundle:nil]) { _tableViewStyle = style; _hideCellSeparator = NO; } return self; } - (instancetype)initWithCoder:(NSCoder *)coder { if (self = [super initWithCoder:coder]) { UITableViewStyle style = UITableViewStyleGrouped; if (@available(iOS 13.0, *)) { style = UITableViewStyleInsetGrouped; } _tableViewStyle = style; _hideCellSeparator = NO; } return self; } - (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) { UITableViewStyle style = UITableViewStyleGrouped; if (@available(iOS 13.0, *)) { style = UITableViewStyleInsetGrouped; } _tableViewStyle = style; _hideCellSeparator = NO; } return self; } - (void)dealloc { [self.view tpbRemoveForKeyboardEvent]; } - (void)tpbSetupInitialData { [super tpbSetupInitialData]; self.keyboardBehavior = TPBCommonTableKeyboardBehaviorDismissOnly; } - (void)tpbSetupSubviews { [super tpbSetupSubviews]; [self.tableView insertSubview:self.emptyView atIndex:0]; [self.view addSubview:self.tableView]; [self.view addSubview:self.tpbInnerSearchBar]; } - (void)tpbMakeConstraint { [super tpbMakeConstraint]; [self.emptyView mas_remakeConstraints:^(MASConstraintMaker *make) { make.leading.trailing.equalTo(self.mas_tpSafeAreaLayoutGuide); self.emptyCenterYConstraint = make.centerY.equalTo(self.mas_tpSafeAreaLayoutGuide); }]; [self.tableView mas_remakeConstraints:^(MASConstraintMaker *make) { make.top.equalTo(self.mas_tpSafeAreaLayoutGuide); make.leading.trailing.equalTo(self.mas_tpSafeAreaLayoutGuide); make.bottom.equalTo(self.view); }]; CGFloat searchHeight = [self.tpbInnerSearchBar preferredHeight]; [self.tpbInnerSearchBar mas_remakeConstraints:^(MASConstraintMaker *make) { self.searchBarTopConstraint = make.top.equalTo(self.mas_tpSafeAreaLayoutGuide).offset(0); make.leading.trailing.equalTo(self.mas_tpSafeAreaLayoutGuide); self.searchBarHeightConstraint = make.height.equalTo(@(searchHeight)); }]; } - (void)tpbBindActions { [super tpbBindActions]; TPBWeakSelf [self tpbAddContentSizeDidChangeConfig:^(id _Nonnull object, TPBDynamicContentManager * _Nonnull manager) { TPBStrongSelf dispatch_async(dispatch_get_main_queue(), ^{ [_self updateTableHeader]; [_self.tableView reloadData]; }); } notifyWhenRegister:NO]; } - (void)viewWillLayoutSubviews { [super viewWillLayoutSubviews]; [self.view bringSubviewToFront:self.tpbInnerSearchBar]; [self updateSearchBarPosition]; } #pragma mark - Public - (void)setSectionArray:(NSArray<TPBTableSectionModel *> *)sectionArray { _sectionArray = sectionArray; [self.tableView reloadData]; } - (void)setSearchBarShow:(BOOL)searchBarShow { _searchBarShow = searchBarShow; self.tpbInnerSearchBar.hidden = !searchBarShow; [self updateTableHeader]; } - (NSString *)searchPlaceholder { return self.tpbInnerSearchBar.searchPlaceholder; } - (void)setSearchPlaceholder:(NSString *)searchPlaceholder { self.tpbInnerSearchBar.searchPlaceholder = searchPlaceholder; } - (void)updateSearchKey:(NSString *)searchKey { [self.tpbInnerSearchBar updateSearchKey:searchKey]; } - (void)setCustomTableHeaderView:(UIView *)customTableHeaderView { _customTableHeaderView = customTableHeaderView; [self updateTableHeader]; } - (void)setKeyboardBehavior:(TPBCommonTableKeyboardBehavior)keyboardBehavior { _keyboardBehavior = keyboardBehavior; switch (keyboardBehavior) { case TPBCommonTableKeyboardBehaviorDismissOnly: [self.view tpbRegisterForKeyboardEvent]; break; case TPBCommonTableKeyboardBehaviorDismissAndRespondClick: [self.view tpbRemoveForKeyboardEvent]; break; default: break; } } - (void)focusToFirstEligibleElement { NSIndexPath *indexPath = nil; for (NSUInteger section = 0; section < self.sectionArray.count; section++) { TPBTableSectionModel *sectionModel = self.sectionArray[section]; for (NSUInteger row = 0; row < sectionModel.cellModelArray.count; row++) { TPBBaseTableCellModel *cellModel = sectionModel.cellModelArray[row]; if (cellModel.isAutoFocusEnabled) { indexPath = [NSIndexPath indexPathForRow:row inSection:section]; break; } } if (indexPath != nil) break; } if (indexPath == nil) return; UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath]; if (cell == nil) return; if ([TPBA11yHelper isVoiceOverOn]) { UIAccessibilityPostNotification(UIAccessibilityScreenChangedNotification, cell); } else { [self.tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:YES]; } } #pragma mark - UITableViewDataSource & UITableViewDelegate // 注册自定义Cell - (void)registerCustomCellWithCellModel:(TPBCustomTableCellBaseModel *)customCellModel tableView:(UITableView *)tableView cellIdentifier:(NSString *)cellIdentifier { if (customCellModel.cellClass != nil) { BOOL isCellClassValid = [customCellModel.cellClass isSubclassOfClass:[UITableViewCell class]]; BOOL isValid = isCellClassValid; NSAssert(isCellClassValid, @"TPBCustomBaseTableCellModel's cellClass「%@」is not Subclass of UITableViewCell!", NSStringFromClass(customCellModel.cellClass)); if (!isValid) { return; } // 注册Cell Class [tableView registerClass:customCellModel.cellClass forCellReuseIdentifier:cellIdentifier]; } else if (customCellModel.cellNib != nil) { // 注册Cell Nib [tableView registerNib:customCellModel.cellNib forCellReuseIdentifier:cellIdentifier]; } } - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return self.sectionArray.count; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { if (section < 0 || self.sectionArray.count <= section) { return 0; } TPBTableSectionModel *sectionModel = self.sectionArray[section]; return sectionModel.cellModelArray.count; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { if (indexPath.section < 0 || self.sectionArray.count <= indexPath.section) { return [[UITableViewCell alloc] init]; } TPBTableSectionModel *sectionModel = self.sectionArray[indexPath.section]; if (indexPath.row < 0 || sectionModel.cellModelArray.count <= indexPath.row) { return [[UITableViewCell alloc] init]; } BOOL isRTL = self.view.effectiveUserInterfaceLayoutDirection == UIUserInterfaceLayoutDirectionRightToLeft; BOOL isLast = indexPath.row == sectionModel.cellModelArray.count - 1; TPBBaseTableCellModel *model = sectionModel.cellModelArray[indexPath.row]; switch (model.cellType) { case TPBTableCellTypeCustomCell: { if ([model isKindOfClass:[TPBCustomTableCellBaseModel class]]) { TPBCustomTableCellBaseModel *cellModel = (TPBCustomTableCellBaseModel *)model; NSString *cellIdentifier = [cellModel effectiveCellIdentifier:isRTL]; UITableViewCell *cell; if (TPBA11yHelper.isVoiceOverOn && cellModel.cellClass != nil) { cell = [[cellModel.cellClass alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } if (cell == nil) { // 若无法获取Cell，说明可能是未注册自定义Cell，则注册自定义Cell之后尝试重新取值 [self registerCustomCellWithCellModel:cellModel tableView:tableView cellIdentifier:cellIdentifier]; cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } if (cellModel.cellConfigCallback) { cellModel.cellConfigCallback(tableView, indexPath, cell, cellModel); } if ([cell isKindOfClass:[TPBBaseTableViewCell class]]) { TPBBaseTableViewCell *baseCell = (TPBBaseTableViewCell *)cell; [baseCell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; } return cell; } } break; case TPBTableCellTypeCustomView: { if ([model isKindOfClass:[TPBCustomViewTableCellModel class]]) { TPBCustomViewTableCellModel *cellModel = (TPBCustomViewTableCellModel *)model; NSString *cellIdentifier = [TPBCustomViewTableCell cellIdentifier:isRTL]; TPBCustomViewTableCell *cell; cell = [[TPBCustomViewTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeTitleSubtitle: { if ([model isKindOfClass:[TPBTitleSubtitleTableCellModel class]]) { TPBTitleSubtitleTableCellModel *cellModel = (TPBTitleSubtitleTableCellModel *)model; NSString *cellIdentifier = [TPBTitleSubtitleTableCell cellIdentifier:isRTL]; TPBTitleSubtitleTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBTitleSubtitleTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeSwitch: { if ([model isKindOfClass:[TPBSwitchTableCellModel class]]) { TPBSwitchTableCellModel *cellModel = (TPBSwitchTableCellModel *)model; NSString *cellIdentifier = [TPBSwitchTableCell cellIdentifier:isRTL]; TPBSwitchTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBSwitchTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeListButton: { if ([model isKindOfClass:[TPBListButtonTableCellModel class]]) { TPBListButtonTableCellModel *cellModel = (TPBListButtonTableCellModel *)model; NSString *cellIdentifier = [TPBListButtonTableCell cellIdentifier:isRTL]; TPBListButtonTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBListButtonTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeProgress: { if ([model isKindOfClass:[TPBProgressTableCellModel class]]) { TPBProgressTableCellModel *cellModel = (TPBProgressTableCellModel *)model; NSString *cellIdentifier = [TPBProgressTableCell cellIdentifier:isRTL]; TPBProgressTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBProgressTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeCommonInput: { if ([model isKindOfClass:[TPBCommonInputTableCellModel class]]) { TPBCommonInputTableCellModel *cellModel = (TPBCommonInputTableCellModel *)model; NSString *cellIdentifier = [TPBCommonInputTableCell cellIdentifier:isRTL]; TPBCommonInputTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBCommonInputTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } cell.inputDelegate = self; [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeCheck: { if ([model isKindOfClass:[TPBCheckTableCellModel class]]) { TPBCheckTableCellModel *cellModel = (TPBCheckTableCellModel *)model; BOOL isCustomizedCellHeight = cellModel.height.isCustomHeight; NSString *cellIdentifier = [TPBCheckTableCell cellIdentifier:isRTL]; TPBCheckTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBCheckTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel isCustomizedCellHeight:isCustomizedCellHeight]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeJumpSelect: { if ([model isKindOfClass:[TPBJumpSelectTableCellModel class]]) { TPBJumpSelectTableCellModel *cellModel = (TPBJumpSelectTableCellModel *)model; NSString *cellIdentifier = [TPBJumpSelectTableCell cellIdentifier:isRTL]; TPBJumpSelectTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBJumpSelectTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && TPBIsEmptyString(cellModel.title) && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeMenuSelect: { if ([model isKindOfClass:[TPBMenuSelectTableCellModel class]]) { TPBMenuSelectTableCellModel *cellModel = (TPBMenuSelectTableCellModel *)model; NSString *cellIdentifier = [TPBMenuSelectTableCell cellIdentifier:isRTL]; TPBMenuSelectTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBMenuSelectTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeListInput: { if ([model isKindOfClass:[TPBListInputTableCellModel class]]) { TPBListInputTableCellModel *cellModel = (TPBListInputTableCellModel *)model; NSString *cellIdentifier = [TPBListInputTableCell cellIdentifier:isRTL]; TPBListInputTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBListInputTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } cell.inputDelegate = self; [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeTitleAction: { if ([model isKindOfClass:[TPBTitleActionTableCellModel class]]) { TPBTitleActionTableCellModel *cellModel = (TPBTitleActionTableCellModel *)model; NSString *cellIdentifier = [TPBTitleActionTableCell cellIdentifier:isRTL]; TPBTitleActionTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBTitleActionTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; } return [[UITableViewCell alloc] init]; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { if (indexPath.section < 0 || self.sectionArray.count <= indexPath.section) { return UITableViewAutomaticDimension; } TPBTableSectionModel *sectionModel = self.sectionArray[indexPath.section]; if (indexPath.row < 0 || sectionModel.cellModelArray.count <= indexPath.row) { return UITableViewAutomaticDimension; } TPBBaseTableCellModel *cellModel = sectionModel.cellModelArray[indexPath.row]; if (cellModel.height.isCustomHeight) { return cellModel.height.customHeight; } return UITableViewAutomaticDimension; } // Header - (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section { if (section < 0 || self.sectionArray.count <= section) { return [UIView new]; } TPBTableSectionModel *sectionModel = self.sectionArray[section]; if (sectionModel.customHeaderView != nil) { return sectionModel.customHeaderView; } if (TPBIsEmptyString(sectionModel.headerTitle) && sectionModel.headerAction == nil) { return [UIView new]; } TPBTableTextSectionHeader *headerView = [TPBTableTextSectionHeader new]; [headerView updateSectionModel:sectionModel]; return headerView; } - (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section { if (section < 0 || self.sectionArray.count <= section) { return TPBDesign.list.sectionHeaderHeight; } TPBTableSectionModel *sectionModel = self.sectionArray[section]; if (sectionModel.sectionHeaderHeight.isCustomHeight) { return sectionModel.sectionHeaderHeight.customHeight; } if (sectionModel.customHeaderView != nil) { return UITableViewAutomaticDimension; } if (TPBIsEmptyString(sectionModel.headerTitle) && sectionModel.headerAction == nil) { if (self.searchBarShow && section == 0) { return 10; } return TPBDesign.list.sectionHeaderHeight; } return UITableViewAutomaticDimension; } // Footer - (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section { if (section < 0 || self.sectionArray.count <= section) { return [UIView new]; } TPBTableSectionModel *sectionModel = self.sectionArray[section]; if (sectionModel.customFooterView != nil) { return sectionModel.customFooterView; } if (TPBIsEmptyString(sectionModel.footerTitle) && sectionModel.footerAction == nil) { return [UIView new]; } TPBTableTextSectionFooter *footerView = [TPBTableTextSectionFooter new]; [footerView updateSectionModel:sectionModel]; return footerView; } - (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section { if (section < 0 || self.sectionArray.count <= section) { return TPBDesign.list.sectionFooterHeight; } TPBTableSectionModel *sectionModel = self.sectionArray[section]; if (sectionModel.sectionFooterHeight.isCustomHeight) { return sectionModel.sectionFooterHeight.customHeight; } if (sectionModel.customFooterView != nil) { return UITableViewAutomaticDimension; } if (TPBIsEmptyString(sectionModel.footerTitle) && sectionModel.footerAction == nil) { return TPBDesign.list.sectionFooterHeight; } return UITableViewAutomaticDimension; } // TableViewCell点击 - (BOOL)tableView:(UITableView *)tableView shouldHighlightRowAtIndexPath:(NSIndexPath *)indexPath { [tableView deselectRowAtIndexPath:indexPath animated:NO]; if (indexPath.section < 0 || self.sectionArray.count <= indexPath.section) { return NO; } TPBTableSectionModel *sectionModel = self.sectionArray[indexPath.section]; if (indexPath.row < 0 || sectionModel.cellModelArray.count <= indexPath.row) { return NO; } TPBBaseTableCellModel *cellModel = sectionModel.cellModelArray[indexPath.row]; switch (cellModel.cellType) { case TPBTableCellTypeCustomCell: case TPBTableCellTypeCustomView: case TPBTableCellTypeTitleSubtitle: case TPBTableCellTypeSwitch: case TPBTableCellTypeCheck: case TPBTableCellTypeListButton: case TPBTableCellTypeJumpSelect: case TPBTableCellTypeMenuSelect: case TPBTableCellTypeProgress: case TPBTableCellTypeTitleAction: return YES; case TPBTableCellTypeCommonInput: case TPBTableCellTypeListInput: return NO; } } - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { [tableView deselectRowAtIndexPath:indexPath animated:NO]; if (indexPath.section < 0 || self.sectionArray.count <= indexPath.section) { return; } TPBTableSectionModel *sectionModel = self.sectionArray[indexPath.section]; if (indexPath.row < 0 || sectionModel.cellModelArray.count <= indexPath.row) { return; } if (self.keyboardBehavior == TPBCommonTableKeyboardBehaviorDismissAndRespondClick) { [self tpbHideKeyboard]; } TPBBaseTableCellModel *model = sectionModel.cellModelArray[indexPath.row]; switch (model.cellType) { case TPBTableCellTypeCustomCell: { if ([model isKindOfClass:[TPBCustomTableCellBaseModel class]]) { TPBCustomTableCellBaseModel *cellModel = (TPBCustomTableCellBaseModel *)model; if (cellModel.didSelectCellCallback) { cellModel.didSelectCellCallback(cellModel, indexPath); } } } break; case TPBTableCellTypeCustomView: { if ([model isKindOfClass:[TPBCustomViewTableCellModel class]]) { TPBCustomViewTableCellModel *cellModel = (TPBCustomViewTableCellModel *)model; if (cellModel.didSelectCellCallback) { cellModel.didSelectCellCallback(cellModel, indexPath); } } } break; case TPBTableCellTypeTitleSubtitle: { if ([model isKindOfClass:[TPBTitleSubtitleTableCellModel class]]) { TPBTitleSubtitleTableCellModel *cellModel = (TPBTitleSubtitleTableCellModel *)model; if (cellModel.didSelectCellCallback) { cellModel.didSelectCellCallback(cellModel, indexPath); } } } break; case TPBTableCellTypeSwitch: { if ([model isKindOfClass:[TPBSwitchTableCellModel class]]) { TPBSwitchTableCellModel *cellModel = (TPBSwitchTableCellModel *)model; if (cellModel.switchDidClickHotZoneCallback) { cellModel.switchDidClickHotZoneCallback(); } } } break; case TPBTableCellTypeListButton: { if ([model isKindOfClass:[TPBListButtonTableCellModel class]]) { TPBListButtonTableCellModel *cellModel = (TPBListButtonTableCellModel *)model; if (cellModel.actionEnabled && cellModel.didSelectCellCallback) { cellModel.didSelectCellCallback(cellModel, indexPath); } } } break; case TPBTableCellTypeCheck: { if ([model isKindOfClass:[TPBCheckTableCellModel class]]) { TPBCheckTableCellModel *cellModel = (TPBCheckTableCellModel *)model; if (cellModel.checkEnabled && cellModel.didSelectCellCallback) { cellModel.didSelectCellCallback(cellModel, indexPath); } } } break; case TPBTableCellTypeJumpSelect: { if ([model isKindOfClass:[TPBJumpSelectTableCellModel class]]) { TPBJumpSelectTableCellModel *cellModel = (TPBJumpSelectTableCellModel *)model; if (cellModel.didSelectCellCallback) { cellModel.didSelectCellCallback(cellModel, indexPath); } } } case TPBTableCellTypeTitleAction: { if ([model isKindOfClass:[TPBTitleActionTableCellModel class]]) { TPBTitleActionTableCellModel *cellModel = (TPBTitleActionTableCellModel *)model; if (cellModel.didSelectCellCallback) { cellModel.didSelectCellCallback(cellModel, indexPath); } } } break; case TPBTableCellTypeMenuSelect: break; case TPBTableCellTypeProgress: case TPBTableCellTypeCommonInput: case TPBTableCellTypeListInput: break; } } //- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath{ // if (indexPath.row < 0 || indexPath.row >= self.cloudDeviceList.count) { // return NO; // } // TPBDMECDevice *ecDevice = self.cloudDeviceList[indexPath.row]; // return [self canForgetWithDevice:ecDevice]; //} //- (NSArray<UITableViewRowAction *> *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath { // if (indexPath.row < 0 || indexPath.row >= self.cloudDeviceList.count) { // return @[]; // } // TPBDMECDevice *ecDevice = self.cloudDeviceList[indexPath.row]; // TPBWeakSelf; // UITableViewRowAction *deleteAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDestructive title:gControllerCloudAccess.controllerCloudAccessForget handler:^(UITableViewRowAction *action, NSIndexPath *indexPath){ // TPBStrongSelf; // [_self popAlertControlForUnbindActionWithECDevice:ecDevice]; // }]; // deleteAction.backgroundColor = [UIColor tpbRed]; // return @[deleteAction]; //} #pragma mark - UIScrollViewDelegate - (void)scrollViewDidScroll:(UIScrollView *)scrollView { [self updateSearchBarPosition]; } #pragma mark - TPBTableSearchHeaderDelegate - (void)tpbTableSearchHeaderHideKeyboard { [self tpbHideKeyboard]; } #pragma mark - TPBTableCommonInputDelegate - (void)tableCommonInputFieldDidClickReturn:(TPBCommonInputView *)inputView textField:(UITextField *)textField { [self handleUserClickReturnForTextField:textField]; } #pragma mark - TPBTableListInputDelegate - (void)tableListInputFieldDidClickReturn:(TPBListInputTableCell *)inputCell textField:(UITextField *)textField { [self handleUserClickReturnForTextField:textField]; } #pragma mark - Private - (void)updateSearchBarPosition { CGFloat tableY = self.tableView.frame.origin.y; CGRect convertedRect = [self.tpbSearchBarPlaceholderView convertRect:self.tpbSearchBarPlaceholderView.bounds toView:self.view]; CGFloat diffY = convertedRect.origin.y - tableY; CGFloat targetConstant = MAX(0, diffY); if (self.searchBarTopConstraint.tpbConstant != targetConstant) { self.searchBarTopConstraint.tpbConstant = targetConstant; } } // 用户点击UITextField键盘Return - (void)handleUserClickReturnForTextField:(UITextField *)textField { if (textField.returnKeyType != UIReturnKeyNext) { [textField resignFirstResponder]; return; } if ([self.tableView focusNextTextField]) { } else { [textField resignFirstResponder]; } } - (void)updateTableHeader { if (self.searchBarShow) { CGFloat searchBarHeight = [self.tpbInnerSearchBar preferredHeight]; self.tpbSearchBarPlaceholderView.frame = CGRectMake(0, 0, self.view.bounds.size.width, searchBarHeight); self.tableView.tableHeaderView = self.tpbSearchBarPlaceholderView; self.searchBarHeightConstraint.tpbConstant = searchBarHeight; } else if (self.customTableHeaderView) { self.tableView.tableHeaderView = self.customTableHeaderView; } else { UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, CGFLOAT_MIN)]; self.tableView.tableHeaderView = view; } } #pragma mark - Property - (TPBEmptyView *)emptyView { if (!_emptyView) { _emptyView = [TPBEmptyView new]; _emptyView.hidden = YES; } return _emptyView; } - (UIView *)tpbSearchBarPlaceholderView { if (!_tpbSearchBarPlaceholderView) { _tpbSearchBarPlaceholderView = [UIView new]; } return _tpbSearchBarPlaceholderView; } - (TPBTableSearchHeader *)tpbInnerSearchBar { if (!_tpbInnerSearchBar) { CGRect frame = CGRectMake(0, 0, self.view.bounds.size.width, 62); _tpbInnerSearchBar = [[TPBTableSearchHeader alloc] initWithFrame:frame]; _tpbInnerSearchBar.delegate = self; _tpbInnerSearchBar.hidden = YES; _tpbInnerSearchBar.backgroundColor = [UIColor tpbBackground]; } return _tpbInnerSearchBar; } - (UITableView *)tableView { if (!_tableView) { _tableView = [[TPKeyboardAvoidingTableView alloc] initWithFrame:CGRectZero style:self.tableViewStyle]; if (@available(iOS 13.0, *)) { _tableView.automaticallyAdjustsScrollIndicatorInsets = YES; } if (@available(iOS 15.0, *)) { UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, CGFLOAT_MIN)]; _tableView.tableHeaderView = view; _tableView.sectionHeaderTopPadding = 0; } _tableView.backgroundColor = [UIColor clearColor]; _tableView.estimatedRowHeight = 72; _tableView.estimatedSectionHeaderHeight = 68; _tableView.showsHorizontalScrollIndicator = NO; _tableView.keyboardDismissMode = UIScrollViewKeyboardDismissModeOnDrag; _tableView.separatorStyle = UITableViewCellSeparatorStyleNone; _tableView.sectionIndexColor = [UIColor tpbTableSectionIndexColor]; _tableView.delegate = self; _tableView.dataSource = self; NSArray<Class> *cellClassArray = @[ [TPBCustomViewTableCell class], [TPBTitleSubtitleTableCell class], [TPBSwitchTableCell class], [TPBProgressTableCell class], [TPBCommonInputTableCell class], [TPBCheckTableCell class], [TPBJumpSelectTableCell class], [TPBMenuSelectTableCell class], [TPBListInputTableCell class], [TPBListButtonTableCell class], [TPBTitleActionTableCell class] ]; for (Class cls in cellClassArray) { if ([cls isSubclassOfClass:[TPBBaseTableViewCell class]]) { NSString *cellIdentifier = [cls cellIdentifier]; [_tableView registerClass:cls forCellReuseIdentifier:cellIdentifier]; NSString *rtlCellIdentifier = [cls cellIdentifier:YES]; [_tableView registerClass:cls forCellReuseIdentifier:rtlCellIdentifier]; NSString *ltrCellIdentifier = [cls cellIdentifier:NO]; [_tableView registerClass:cls forCellReuseIdentifier:ltrCellIdentifier]; } } } return _tableView; } @end
最新发布
12-03
Thread 1: Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value ``` 并且是在 `[self setupSubviews]` 中触发的。 结合你提供的父类代码，我们可以确认以下关键事实： ### ✅ ...
这里是m文件 应该是这里面具体写了吧 #import "TPBCommonTableController.h" #import "TPBTableTextSectionHeader.h" #import "TPBTableTextSectionFooter.h" #import "TPBDesignKit.h" #import "UIView+TPBExpanded.h" #import "MASConstraint+TPBExpanded.h" #import "TPBTableSectionModel.h" #import "TPBCommonInputView.h" #import "TPBCustomTableCellBaseModel.h" #import "TPBCustomViewTableCell.h" #import "TPBTitleSubtitleTableCell.h" #import "TPBSwitchTableCell.h" #import "TPBListButtonTableCell.h" #import "TPBProgressTableCell.h" #import "TPBCommonInputTableCell.h" #import "TPBCheckTableCell.h" #import "TPBJumpSelectTableCell.h" #import "TPBMenuSelectTableCell.h" #import "TPBListInputTableCell.h" #import "TPBTitleActionTableCell.h" @interface TPBCommonTableController () < TPBTableCommonInputDelegate, TPBTableListInputDelegate > @property (nonatomic, assign) UITableViewStyle tableViewStyle; @property (nonatomic, strong) UIView *tpbSearchBarPlaceholderView; @property (nonatomic, strong) TPBTableSearchHeader *tpbInnerSearchBar; @property (nonatomic, strong) TPBEmptyView *emptyView; @property (nonatomic, strong) TPKeyboardAvoidingTableView *tableView; @property (nonatomic, strong) MASConstraint *emptyCenterYConstraint; @property (nonatomic, strong) MASConstraint *searchBarTopConstraint; @property (nonatomic, strong) MASConstraint *searchBarHeightConstraint; @end @implementation TPBCommonTableController - (instancetype)init { if (@available(iOS 13.0, *)) { return [self initWithTableViewStyle:UITableViewStyleInsetGrouped]; } else { return [self initWithTableViewStyle:UITableViewStyleGrouped]; } } - (instancetype)initWithTableViewStyle:(UITableViewStyle)style { if (self = [super initWithNibName:nil bundle:nil]) { _tableViewStyle = style; _hideCellSeparator = NO; } return self; } - (instancetype)initWithCoder:(NSCoder *)coder { if (self = [super initWithCoder:coder]) { UITableViewStyle style = UITableViewStyleGrouped; if (@available(iOS 13.0, *)) { style = UITableViewStyleInsetGrouped; } _tableViewStyle = style; _hideCellSeparator = NO; } return self; } - (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) { UITableViewStyle style = UITableViewStyleGrouped; if (@available(iOS 13.0, *)) { style = UITableViewStyleInsetGrouped; } _tableViewStyle = style; _hideCellSeparator = NO; } return self; } - (void)dealloc { [self.view tpbRemoveForKeyboardEvent]; } - (void)tpbSetupInitialData { [super tpbSetupInitialData]; self.keyboardBehavior = TPBCommonTableKeyboardBehaviorDismissOnly; } - (void)tpbSetupSubviews { [super tpbSetupSubviews]; [self.tableView insertSubview:self.emptyView atIndex:0]; [self.view addSubview:self.tableView]; [self.view addSubview:self.tpbInnerSearchBar]; } - (void)tpbMakeConstraint { [super tpbMakeConstraint]; [self.emptyView mas_remakeConstraints:^(MASConstraintMaker *make) { make.leading.trailing.equalTo(self.mas_tpSafeAreaLayoutGuide); self.emptyCenterYConstraint = make.centerY.equalTo(self.mas_tpSafeAreaLayoutGuide); }]; [self.tableView mas_remakeConstraints:^(MASConstraintMaker *make) { make.top.equalTo(self.mas_tpSafeAreaLayoutGuide); make.leading.trailing.equalTo(self.mas_tpSafeAreaLayoutGuide); make.bottom.equalTo(self.view); }]; CGFloat searchHeight = [self.tpbInnerSearchBar preferredHeight]; [self.tpbInnerSearchBar mas_remakeConstraints:^(MASConstraintMaker *make) { self.searchBarTopConstraint = make.top.equalTo(self.mas_tpSafeAreaLayoutGuide).offset(0); make.leading.trailing.equalTo(self.mas_tpSafeAreaLayoutGuide); self.searchBarHeightConstraint = make.height.equalTo(@(searchHeight)); }]; } - (void)tpbBindActions { [super tpbBindActions]; TPBWeakSelf [self tpbAddContentSizeDidChangeConfig:^(id _Nonnull object, TPBDynamicContentManager * _Nonnull manager) { TPBStrongSelf dispatch_async(dispatch_get_main_queue(), ^{ [_self updateTableHeader]; [_self.tableView reloadData]; }); } notifyWhenRegister:NO]; } - (void)viewWillLayoutSubviews { [super viewWillLayoutSubviews]; [self.view bringSubviewToFront:self.tpbInnerSearchBar]; [self updateSearchBarPosition]; } #pragma mark - Public - (void)setSectionArray:(NSArray<TPBTableSectionModel *> *)sectionArray { _sectionArray = sectionArray; [self.tableView reloadData]; } - (void)setSearchBarShow:(BOOL)searchBarShow { _searchBarShow = searchBarShow; self.tpbInnerSearchBar.hidden = !searchBarShow; [self updateTableHeader]; } - (NSString *)searchPlaceholder { return self.tpbInnerSearchBar.searchPlaceholder; } - (void)setSearchPlaceholder:(NSString *)searchPlaceholder { self.tpbInnerSearchBar.searchPlaceholder = searchPlaceholder; } - (void)updateSearchKey:(NSString *)searchKey { [self.tpbInnerSearchBar updateSearchKey:searchKey]; } - (void)setCustomTableHeaderView:(UIView *)customTableHeaderView { _customTableHeaderView = customTableHeaderView; [self updateTableHeader]; } - (void)setKeyboardBehavior:(TPBCommonTableKeyboardBehavior)keyboardBehavior { _keyboardBehavior = keyboardBehavior; switch (keyboardBehavior) { case TPBCommonTableKeyboardBehaviorDismissOnly: [self.view tpbRegisterForKeyboardEvent]; break; case TPBCommonTableKeyboardBehaviorDismissAndRespondClick: [self.view tpbRemoveForKeyboardEvent]; break; default: break; } } - (void)focusToFirstEligibleElement { NSIndexPath *indexPath = nil; for (NSUInteger section = 0; section < self.sectionArray.count; section++) { TPBTableSectionModel *sectionModel = self.sectionArray[section]; for (NSUInteger row = 0; row < sectionModel.cellModelArray.count; row++) { TPBBaseTableCellModel *cellModel = sectionModel.cellModelArray[row]; if (cellModel.isAutoFocusEnabled) { indexPath = [NSIndexPath indexPathForRow:row inSection:section]; break; } } if (indexPath != nil) break; } if (indexPath == nil) return; UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath]; if (cell == nil) return; if ([TPBA11yHelper isVoiceOverOn]) { UIAccessibilityPostNotification(UIAccessibilityScreenChangedNotification, cell); } else { [self.tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:YES]; } } #pragma mark - UITableViewDataSource & UITableViewDelegate // 注册自定义Cell - (void)registerCustomCellWithCellModel:(TPBCustomTableCellBaseModel *)customCellModel tableView:(UITableView *)tableView cellIdentifier:(NSString *)cellIdentifier { if (customCellModel.cellClass != nil) { BOOL isCellClassValid = [customCellModel.cellClass isSubclassOfClass:[UITableViewCell class]]; BOOL isValid = isCellClassValid; NSAssert(isCellClassValid, @"TPBCustomBaseTableCellModel's cellClass「%@」is not Subclass of UITableViewCell!", NSStringFromClass(customCellModel.cellClass)); if (!isValid) { return; } // 注册Cell Class [tableView registerClass:customCellModel.cellClass forCellReuseIdentifier:cellIdentifier]; } else if (customCellModel.cellNib != nil) { // 注册Cell Nib [tableView registerNib:customCellModel.cellNib forCellReuseIdentifier:cellIdentifier]; } } - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return self.sectionArray.count; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { if (section < 0 || self.sectionArray.count <= section) { return 0; } TPBTableSectionModel *sectionModel = self.sectionArray[section]; return sectionModel.cellModelArray.count; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { if (indexPath.section < 0 || self.sectionArray.count <= indexPath.section) { return [[UITableViewCell alloc] init]; } TPBTableSectionModel *sectionModel = self.sectionArray[indexPath.section]; if (indexPath.row < 0 || sectionModel.cellModelArray.count <= indexPath.row) { return [[UITableViewCell alloc] init]; } BOOL isRTL = self.view.effectiveUserInterfaceLayoutDirection == UIUserInterfaceLayoutDirectionRightToLeft; BOOL isLast = indexPath.row == sectionModel.cellModelArray.count - 1; TPBBaseTableCellModel *model = sectionModel.cellModelArray[indexPath.row]; switch (model.cellType) { case TPBTableCellTypeCustomCell: { if ([model isKindOfClass:[TPBCustomTableCellBaseModel class]]) { TPBCustomTableCellBaseModel *cellModel = (TPBCustomTableCellBaseModel *)model; NSString *cellIdentifier = [cellModel effectiveCellIdentifier:isRTL]; UITableViewCell *cell; if (TPBA11yHelper.isVoiceOverOn && cellModel.cellClass != nil) { cell = [[cellModel.cellClass alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } if (cell == nil) { // 若无法获取Cell，说明可能是未注册自定义Cell，则注册自定义Cell之后尝试重新取值 [self registerCustomCellWithCellModel:cellModel tableView:tableView cellIdentifier:cellIdentifier]; cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } if (cellModel.cellConfigCallback) { cellModel.cellConfigCallback(tableView, indexPath, cell, cellModel); } if ([cell isKindOfClass:[TPBBaseTableViewCell class]]) { TPBBaseTableViewCell *baseCell = (TPBBaseTableViewCell *)cell; [baseCell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; } return cell; } } break; case TPBTableCellTypeCustomView: { if ([model isKindOfClass:[TPBCustomViewTableCellModel class]]) { TPBCustomViewTableCellModel *cellModel = (TPBCustomViewTableCellModel *)model; NSString *cellIdentifier = [TPBCustomViewTableCell cellIdentifier:isRTL]; TPBCustomViewTableCell *cell; cell = [[TPBCustomViewTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeTitleSubtitle: { if ([model isKindOfClass:[TPBTitleSubtitleTableCellModel class]]) { TPBTitleSubtitleTableCellModel *cellModel = (TPBTitleSubtitleTableCellModel *)model; NSString *cellIdentifier = [TPBTitleSubtitleTableCell cellIdentifier:isRTL]; TPBTitleSubtitleTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBTitleSubtitleTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeSwitch: { if ([model isKindOfClass:[TPBSwitchTableCellModel class]]) { TPBSwitchTableCellModel *cellModel = (TPBSwitchTableCellModel *)model; NSString *cellIdentifier = [TPBSwitchTableCell cellIdentifier:isRTL]; TPBSwitchTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBSwitchTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeListButton: { if ([model isKindOfClass:[TPBListButtonTableCellModel class]]) { TPBListButtonTableCellModel *cellModel = (TPBListButtonTableCellModel *)model; NSString *cellIdentifier = [TPBListButtonTableCell cellIdentifier:isRTL]; TPBListButtonTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBListButtonTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeProgress: { if ([model isKindOfClass:[TPBProgressTableCellModel class]]) { TPBProgressTableCellModel *cellModel = (TPBProgressTableCellModel *)model; NSString *cellIdentifier = [TPBProgressTableCell cellIdentifier:isRTL]; TPBProgressTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBProgressTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeCommonInput: { if ([model isKindOfClass:[TPBCommonInputTableCellModel class]]) { TPBCommonInputTableCellModel *cellModel = (TPBCommonInputTableCellModel *)model; NSString *cellIdentifier = [TPBCommonInputTableCell cellIdentifier:isRTL]; TPBCommonInputTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBCommonInputTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } cell.inputDelegate = self; [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeCheck: { if ([model isKindOfClass:[TPBCheckTableCellModel class]]) { TPBCheckTableCellModel *cellModel = (TPBCheckTableCellModel *)model; BOOL isCustomizedCellHeight = cellModel.height.isCustomHeight; NSString *cellIdentifier = [TPBCheckTableCell cellIdentifier:isRTL]; TPBCheckTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBCheckTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel isCustomizedCellHeight:isCustomizedCellHeight]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeJumpSelect: { if ([model isKindOfClass:[TPBJumpSelectTableCellModel class]]) { TPBJumpSelectTableCellModel *cellModel = (TPBJumpSelectTableCellModel *)model; NSString *cellIdentifier = [TPBJumpSelectTableCell cellIdentifier:isRTL]; TPBJumpSelectTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBJumpSelectTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && TPBIsEmptyString(cellModel.title) && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeMenuSelect: { if ([model isKindOfClass:[TPBMenuSelectTableCellModel class]]) { TPBMenuSelectTableCellModel *cellModel = (TPBMenuSelectTableCellModel *)model; NSString *cellIdentifier = [TPBMenuSelectTableCell cellIdentifier:isRTL]; TPBMenuSelectTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBMenuSelectTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeListInput: { if ([model isKindOfClass:[TPBListInputTableCellModel class]]) { TPBListInputTableCellModel *cellModel = (TPBListInputTableCellModel *)model; NSString *cellIdentifier = [TPBListInputTableCell cellIdentifier:isRTL]; TPBListInputTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBListInputTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } cell.inputDelegate = self; [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; case TPBTableCellTypeTitleAction: { if ([model isKindOfClass:[TPBTitleActionTableCellModel class]]) { TPBTitleActionTableCellModel *cellModel = (TPBTitleActionTableCellModel *)model; NSString *cellIdentifier = [TPBTitleActionTableCell cellIdentifier:isRTL]; TPBTitleActionTableCell *cell; if (TPBA11yHelper.isVoiceOverOn) { cell = [[TPBTitleActionTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; } if (cell == nil) { cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; } [cell updateCellModel:cellModel]; [cell updateBottomSeparatorShow:!self.hideCellSeparator && !isLast && !cellModel.hideCellSeparator]; return cell; } } break; } return [[UITableViewCell alloc] init]; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { if (indexPath.section < 0 || self.sectionArray.count <= indexPath.section) { return UITableViewAutomaticDimension; } TPBTableSectionModel *sectionModel = self.sectionArray[indexPath.section]; if (indexPath.row < 0 || sectionModel.cellModelArray.count <= indexPath.row) { return UITableViewAutomaticDimension; } TPBBaseTableCellModel *cellModel = sectionModel.cellModelArray[indexPath.row]; if (cellModel.height.isCustomHeight) { return cellModel.height.customHeight; } return UITableViewAutomaticDimension; } // Header - (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section { if (section < 0 || self.sectionArray.count <= section) { return [UIView new]; } TPBTableSectionModel *sectionModel = self.sectionArray[section]; if (sectionModel.customHeaderView != nil) { return sectionModel.customHeaderView; } if (TPBIsEmptyString(sectionModel.headerTitle) && sectionModel.headerAction == nil) { return [UIView new]; } TPBTableTextSectionHeader *headerView = [TPBTableTextSectionHeader new]; [headerView updateSectionModel:sectionModel]; return headerView; } - (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section { if (section < 0 || self.sectionArray.count <= section) { return TPBDesign.list.sectionHeaderHeight; } TPBTableSectionModel *sectionModel = self.sectionArray[section]; if (sectionModel.sectionHeaderHeight.isCustomHeight) { return sectionModel.sectionHeaderHeight.customHeight; } if (sectionModel.customHeaderView != nil) { return UITableViewAutomaticDimension; } if (TPBIsEmptyString(sectionModel.headerTitle) && sectionModel.headerAction == nil) { if (self.searchBarShow && section == 0) { return 10; } return TPBDesign.list.sectionHeaderHeight; } return UITableViewAutomaticDimension; } // Footer - (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section { if (section < 0 || self.sectionArray.count <= section) { return [UIView new]; } TPBTableSectionModel *sectionModel = self.sectionArray[section]; if (sectionModel.customFooterView != nil) { return sectionModel.customFooterView; } if (TPBIsEmptyString(sectionModel.footerTitle) && sectionModel.footerAction == nil) { return [UIView new]; } TPBTableTextSectionFooter *footerView = [TPBTableTextSectionFooter new]; [footerView updateSectionModel:sectionModel]; return footerView; } - (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section { if (section < 0 || self.sectionArray.count <= section) { return TPBDesign.list.sectionFooterHeight; } TPBTableSectionModel *sectionModel = self.sectionArray[section]; if (sectionModel.sectionFooterHeight.isCustomHeight) { return sectionModel.sectionFooterHeight.customHeight; } if (sectionModel.customFooterView != nil) { return UITableViewAutomaticDimension; } if (TPBIsEmptyString(sectionModel.footerTitle) && sectionModel.footerAction == nil) { return TPBDesign.list.sectionFooterHeight; } return UITableViewAutomaticDimension; } // TableViewCell点击 - (BOOL)tableView:(UITableView *)tableView shouldHighlightRowAtIndexPath:(NSIndexPath *)indexPath { [tableView deselectRowAtIndexPath:indexPath animated:NO]; if (indexPath.section < 0 || self.sectionArray.count <= indexPath.section) { return NO; } TPBTableSectionModel *sectionModel = self.sectionArray[indexPath.section]; if (indexPath.row < 0 || sectionModel.cellModelArray.count <= indexPath.row) { return NO; } TPBBaseTableCellModel *cellModel = sectionModel.cellModelArray[indexPath.row]; switch (cellModel.cellType) { case TPBTableCellTypeCustomCell: case TPBTableCellTypeCustomView: case TPBTableCellTypeTitleSubtitle: case TPBTableCellTypeSwitch: case TPBTableCellTypeCheck: case TPBTableCellTypeListButton: case TPBTableCellTypeJumpSelect: case TPBTableCellTypeMenuSelect: case TPBTableCellTypeProgress: case TPBTableCellTypeTitleAction: return YES; case TPBTableCellTypeCommonInput: case TPBTableCellTypeListInput: return NO; } } - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { [tableView deselectRowAtIndexPath:indexPath animated:NO]; if (indexPath.section < 0 || self.sectionArray.count <= indexPath.section) { return; } TPBTableSectionModel *sectionModel = self.sectionArray[indexPath.section]; if (indexPath.row < 0 || sectionModel.cellModelArray.count <= indexPath.row) { return; } if (self.keyboardBehavior == TPBCommonTableKeyboardBehaviorDismissAndRespondClick) { [self tpbHideKeyboard]; } TPBBaseTableCellModel *model = sectionModel.cellModelArray[indexPath.row]; switch (model.cellType) { case TPBTableCellTypeCustomCell: { if ([model isKindOfClass:[TPBCustomTableCellBaseModel class]]) { TPBCustomTableCellBaseModel *cellModel = (TPBCustomTableCellBaseModel *)model; if (cellModel.didSelectCellCallback) { cellModel.didSelectCellCallback(cellModel, indexPath); } } } break; case TPBTableCellTypeCustomView: { if ([model isKindOfClass:[TPBCustomViewTableCellModel class]]) { TPBCustomViewTableCellModel *cellModel = (TPBCustomViewTableCellModel *)model; if (cellModel.didSelectCellCallback) { cellModel.didSelectCellCallback(cellModel, indexPath); } } } break; case TPBTableCellTypeTitleSubtitle: { if ([model isKindOfClass:[TPBTitleSubtitleTableCellModel class]]) { TPBTitleSubtitleTableCellModel *cellModel = (TPBTitleSubtitleTableCellModel *)model; if (cellModel.didSelectCellCallback) { cellModel.didSelectCellCallback(cellModel, indexPath); } } } break; case TPBTableCellTypeSwitch: { if ([model isKindOfClass:[TPBSwitchTableCellModel class]]) { TPBSwitchTableCellModel *cellModel = (TPBSwitchTableCellModel *)model; if (cellModel.switchDidClickHotZoneCallback) { cellModel.switchDidClickHotZoneCallback(); } } } break; case TPBTableCellTypeListButton: { if ([model isKindOfClass:[TPBListButtonTableCellModel class]]) { TPBListButtonTableCellModel *cellModel = (TPBListButtonTableCellModel *)model; if (cellModel.actionEnabled && cellModel.didSelectCellCallback) { cellModel.didSelectCellCallback(cellModel, indexPath); } } } break; case TPBTableCellTypeCheck: { if ([model isKindOfClass:[TPBCheckTableCellModel class]]) { TPBCheckTableCellModel *cellModel = (TPBCheckTableCellModel *)model; if (cellModel.checkEnabled && cellModel.didSelectCellCallback) { cellModel.didSelectCellCallback(cellModel, indexPath); } } } break; case TPBTableCellTypeJumpSelect: { if ([model isKindOfClass:[TPBJumpSelectTableCellModel class]]) { TPBJumpSelectTableCellModel *cellModel = (TPBJumpSelectTableCellModel *)model; if (cellModel.didSelectCellCallback) { cellModel.didSelectCellCallback(cellModel, indexPath); } } } case TPBTableCellTypeTitleAction: { if ([model isKindOfClass:[TPBTitleActionTableCellModel class]]) { TPBTitleActionTableCellModel *cellModel = (TPBTitleActionTableCellModel *)model; if (cellModel.didSelectCellCallback) { cellModel.didSelectCellCallback(cellModel, indexPath); } } } break; case TPBTableCellTypeMenuSelect: break; case TPBTableCellTypeProgress: case TPBTableCellTypeCommonInput: case TPBTableCellTypeListInput: break; } } //- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath{ // if (indexPath.row < 0 || indexPath.row >= self.cloudDeviceList.count) { // return NO; // } // TPBDMECDevice *ecDevice = self.cloudDeviceList[indexPath.row]; // return [self canForgetWithDevice:ecDevice]; //} //- (NSArray<UITableViewRowAction *> *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath { // if (indexPath.row < 0 || indexPath.row >= self.cloudDeviceList.count) { // return @[]; // } // TPBDMECDevice *ecDevice = self.cloudDeviceList[indexPath.row]; // TPBWeakSelf; // UITableViewRowAction *deleteAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDestructive title:gControllerCloudAccess.controllerCloudAccessForget handler:^(UITableViewRowAction *action, NSIndexPath *indexPath){ // TPBStrongSelf; // [_self popAlertControlForUnbindActionWithECDevice:ecDevice]; // }]; // deleteAction.backgroundColor = [UIColor tpbRed]; // return @[deleteAction]; //} #pragma mark - UIScrollViewDelegate - (void)scrollViewDidScroll:(UIScrollView *)scrollView { [self updateSearchBarPosition]; } #pragma mark - TPBTableSearchHeaderDelegate - (void)tpbTableSearchHeaderHideKeyboard { [self tpbHideKeyboard]; } #pragma mark - TPBTableCommonInputDelegate - (void)tableCommonInputFieldDidClickReturn:(TPBCommonInputView *)inputView textField:(UITextField *)textField { [self handleUserClickReturnForTextField:textField]; } #pragma mark - TPBTableListInputDelegate - (void)tableListInputFieldDidClickReturn:(TPBListInputTableCell *)inputCell textField:(UITextField *)textField { [self handleUserClickReturnForTextField:textField]; } #pragma mark - Private - (void)updateSearchBarPosition { CGFloat tableY = self.tableView.frame.origin.y; CGRect convertedRect = [self.tpbSearchBarPlaceholderView convertRect:self.tpbSearchBarPlaceholderView.bounds toView:self.view]; CGFloat diffY = convertedRect.origin.y - tableY; CGFloat targetConstant = MAX(0, diffY); if (self.searchBarTopConstraint.tpbConstant != targetConstant) { self.searchBarTopConstraint.tpbConstant = targetConstant; } } // 用户点击UITextField键盘Return - (void)handleUserClickReturnForTextField:(UITextField *)textField { if (textField.returnKeyType != UIReturnKeyNext) { [textField resignFirstResponder]; return; } if ([self.tableView focusNextTextField]) { } else { [textField resignFirstResponder]; } } - (void)updateTableHeader { if (self.searchBarShow) { CGFloat searchBarHeight = [self.tpbInnerSearchBar preferredHeight]; self.tpbSearchBarPlaceholderView.frame = CGRectMake(0, 0, self.view.bounds.size.width, searchBarHeight); self.tableView.tableHeaderView = self.tpbSearchBarPlaceholderView; self.searchBarHeightConstraint.tpbConstant = searchBarHeight; } else if (self.customTableHeaderView) { self.tableView.tableHeaderView = self.customTableHeaderView; } else { UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, CGFLOAT_MIN)]; self.tableView.tableHeaderView = view; } } #pragma mark - Property - (TPBEmptyView *)emptyView { if (!_emptyView) { _emptyView = [TPBEmptyView new]; _emptyView.hidden = YES; } return _emptyView; } - (UIView *)tpbSearchBarPlaceholderView { if (!_tpbSearchBarPlaceholderView) { _tpbSearchBarPlaceholderView = [UIView new]; } return _tpbSearchBarPlaceholderView; } - (TPBTableSearchHeader *)tpbInnerSearchBar { if (!_tpbInnerSearchBar) { CGRect frame = CGRectMake(0, 0, self.view.bounds.size.width, 62); _tpbInnerSearchBar = [[TPBTableSearchHeader alloc] initWithFrame:frame]; _tpbInnerSearchBar.delegate = self; _tpbInnerSearchBar.hidden = YES; _tpbInnerSearchBar.backgroundColor = [UIColor tpbBackground]; } return _tpbInnerSearchBar; } - (UITableView *)tableView { if (!_tableView) { _tableView = [[TPKeyboardAvoidingTableView alloc] initWithFrame:CGRectZero style:self.tableViewStyle]; if (@available(iOS 13.0, *)) { _tableView.automaticallyAdjustsScrollIndicatorInsets = YES; } if (@available(iOS 15.0, *)) { UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, CGFLOAT_MIN)]; _tableView.tableHeaderView = view; _tableView.sectionHeaderTopPadding = 0; } _tableView.backgroundColor = [UIColor clearColor]; _tableView.estimatedRowHeight = 72; _tableView.estimatedSectionHeaderHeight = 68; _tableView.showsHorizontalScrollIndicator = NO; _tableView.keyboardDismissMode = UIScrollViewKeyboardDismissModeOnDrag; _tableView.separatorStyle = UITableViewCellSeparatorStyleNone; _tableView.sectionIndexColor = [UIColor tpbTableSectionIndexColor]; _tableView.delegate = self; _tableView.dataSource = self; NSArray<Class> *cellClassArray = @[ [TPBCustomViewTableCell class], [TPBTitleSubtitleTableCell class], [TPBSwitchTableCell class], [TPBProgressTableCell class], [TPBCommonInputTableCell class], [TPBCheckTableCell class], [TPBJumpSelectTableCell class], [TPBMenuSelectTableCell class], [TPBListInputTableCell class], [TPBListButtonTableCell class], [TPBTitleActionTableCell class] ]; for (Class cls in cellClassArray) { if ([cls isSubclassOfClass:[TPBBaseTableViewCell class]]) { NSString *cellIdentifier = [cls cellIdentifier]; [_tableView registerClass:cls forCellReuseIdentifier:cellIdentifier]; NSString *rtlCellIdentifier = [cls cellIdentifier:YES]; [_tableView registerClass:cls forCellReuseIdentifier:rtlCellIdentifier]; NSString *ltrCellIdentifier = [cls cellIdentifier:NO]; [_tableView registerClass:cls forCellReuseIdentifier:ltrCellIdentifier]; } } } return _tableView; } @end
11-29
你已经拿到了 `TPBCommonTableController.m` 文件的完整源码，这非常宝贵！这意味着你现在可以**彻底理解这个基类的设计思想、使用方式和扩展能力**。 下面我将为你 **逐层解析这段代码的核心机制**，并告诉你： ...
(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{ return nil; }父类封装出现nil returned from a method that is expected to return a non-null value，怎么优化
08-10
在 iOS 开发中，如果你在实现 `tableView:cellForRowAtIndexPath:` 方法时返回 `nil`，系统会抛出警告或崩溃，提示如下信息： ``` nil returned from a method that is expected to return a non-null value ``` ...
UITableView 基本使用方法总结
aosiwei9006的博客
12-02 126
1. 首先，Controller需要实现两个delegate，分别是UITableViewDelegate和UITableViewDataSource 2.然后UITableView对象的delegate要设置为self。 3.然后就可以实现这些delegate的一些方法拉。 （1）- (NSInteger)numberOfSe...
cell重用注意事项（对于经常出现重用错误的程序猿吗，可参考一下）
wanglong1121的专栏
04-28 1681
注意事项： 1，在cellForRowAtIndexpath里如果wei'dui
初始化TableViewCell时获取到的宽度错误
JoySeeDog
06-16 6726
需求是这样的，我需要在TableViewCell里面加入一个和Cell的宽高一样大的Label，我使用_contentLabel = [[UILabel alloc] initWithFrame:self.contentView.bounds];来设置Label的宽高，然后使用懒加载在初始化方面里面添加label，完整的代码如下：- (instancetype)initWithStyle:(UITa
UITableViewCell 的各种样式代码
sinat_36521092的博客
07-28 299
样式 一： - (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {     if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {       ...
ios UITableview自定义cell
xidianhuihui的专栏
09-01 850
ios开发UI篇—使用纯代码自定义UItableviewcell实现一个简单的微博界面布局 一、实现效果   二、使用纯代码自定义一个tableview的步骤 1.新建一个继承自UITableViewCell的类 2.重写initWithStyle:reuseIdentifier:方法 添加所有需要显示的子控件(不需要设置子控件的数据和frame,  子
iOS多重嵌套页面
weixin_33893473的博客
02-23 894
先上作品图 UI样式设计非原创，仅用于学习。 主要的功能点 头部视图会跟随移动，选择介绍和攻略页的segmentController又会一直保留在最顶部 点击segmentController切换相应页面，滑动页面变更segmentController的index显示 tableViewCell中嵌套UICollectionView tableViewCell中的实现类似朋友圈“全文”和“收起...
Swift进阶学习三——闭包使用、代理传值、通知使用、UITableView使用
Guessplease的专栏
05-27 412
这期主要介绍对闭包、代理、通知的使用
iOS TableViewCell ~reuseIdentifier(标识符)
石虎
11-17 992
//联系人:石虎 QQ:1224614774 昵称:嗡嘛呢叭咪哄 一、关于语句     static NSString *mainCell = @"SHAinCell";     如果每个cell的结构完全相同，那没问题，就用这一个标识符，          但是如果各个cell结构不完全相同，有的有textfield，有的有button，有的有switc
UITableView的registerClass forCellReuseIdentifier用法详解
热门推荐
沸腾的泪水的专栏
05-05 2万+
转载自:  http://www.zpluz.com/thread-3504-1-1.html tableView: cellForRowAtIndexPath:方法中有两个获得重用cell的方法 UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 和
评论
成就一亿技术人!
拼手气红包6.0元
还能输入1000个字符
 
红包 添加红包
表情包 插入表情
表情包 代码片
 条评论被折叠 查看
添加红包

请填写红包祝福语或标题

个

红包个数最小为10个

元

红包金额最低5元

当前余额3.43元 前往充值 >
需支付：10.00元
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付元
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明：

1.余额是钱包充值的虚拟货币，按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载，可以购买VIP、付费专栏及课程。

余额充值