UITableView Cell移动、插入、删除操作

最新推荐文章于 2018-08-31 13:15:54 发布

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#iOS #移动

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本文详细介绍了如何使用Objective-C语言结合UITableView和UITextField实现单元操作的增删改查功能，包括设置视图、响应编辑状态变化、实现表格数据源代理方法以及处理单元编辑图标、排序和删除操作。

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@interface ViewController ()<UITextFieldDelegate>

@property (strong, nonatomic) IBOutlet UITextField *textField;

@property (nonatomic, strong) NSMutableArray * listTeams;

@end

- (void)viewDidLoad {

[super viewDidLoad];

//设置导航栏

self.navigationItem.rightBarButtonItem = self.editButtonItem;

self.navigationItem.title = @"单元格插入删除";

//设置单元个文本框

self.textField.hidden = YES;

self.textField.delegate = self;

self.listTeams = [NSMutableArray arrayWithObjects:@"中国",@"河北",@"北京" ,nil];

}

#pragma mark UIViewController 生命周期的方法，用于响应视图编辑状态的变化

-(void)setEditing:(BOOL)editing animated:(BOOL)animated{

[super setEditing:editing animated:animated];

[self.tableView setEditing:editing animated:YES];

if (editing) {

self.textField.hidden = NO;

} else {

self.textField.hidden = YES;

}

#pragma mark 实现UITableViewDatasource的代理方法

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

return self.listTeams.count+1;

}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

static NSString *ident = @"cell";

BOOL b_addCell = (indexPath.row==self.listTeams.count);

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ident];

if (cell == nil) {

cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:ident];

}

if (!b_addCell) {

cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;

cell.textLabel.text = [self.listTeams objectAtIndex:indexPath.row];

} else {

self.textField.frame = CGRectMake(10, 0, 300, 33);

self.textField.borderStyle = UITextBorderStyleNone;

self.textField.placeholder = @"add...";

self.textField.text = @"";

[cell.contentView addSubview:self.textField];

}

return cell;

}

//用于单元格编辑图标的设定

-(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{

return UITableViewCellEditingStyleNone; //可移动单元格

// if (indexPath.row == [self.listTeams count]) {

// return UITableViewCellEditingStyleInsert; //插入

// } else {

// return UITableViewCellEditingStyleDelete; // 删除

// }

}

-(BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath{

return YES; //表示可以移动单元格

}

//当拖动排序控件时会出发进行排序

-(void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath{

NSString *stringToMove = [self.listTeams objectAtIndex:sourceIndexPath.row];

[self.listTeams removeObjectAtIndex:sourceIndexPath.row];

[self.listTeams insertObject:stringToMove atIndex:destinationIndexPath.row];

}

//用于实现删除或插入处理

-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{

NSArray *indextPaths = [NSArray arrayWithObject:indexPath];

if (editingStyle == UITableViewCellEditingStyleDelete) {

[self.listTeams removeObjectAtIndex:indexPath.row];

[self.tableView deleteRowsAtIndexPaths:indextPaths withRowAnimation:UITableViewRowAnimationFade];

} else if (editingStyle == UITableViewCellEditingStyleInsert) {

[self.listTeams insertObject:self.textField.text atIndex:[self.listTeams count]];

[self.tableView insertRowsAtIndexPaths:indextPaths withRowAnimation:UITableViewRowAnimationFade];

}

[self.tableView reloadData];

}

-(BOOL)tableView:(UITableView *)tableView shouldHighlightRowAtIndexPath:(NSIndexPath *)indexPath{

if (indexPath.row == [self.listTeams count]) {

return NO;

} else {

return YES;

}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{

return 50;

}