iOS8 SearchBar相关

最新推荐文章于 2022-04-13 19:53:58 发布

不能停止学习的脚步

最新推荐文章于 2022-04-13 19:53:58 发布

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文章标签： iOS searchBar

UISearchDisplayController被iOS8废止，取而代之的是 UISearchController

本文转载自： http://my.oschina.net/u/1999967/blog/309511

苹果官方：UISearchController

0. initWithSearchResultsController: 可以为nil，表示使用当前的 viewController。也可以使用自定义的其他viewcontroller。

self.mySearchController = [[UISearchController alloc] initWithSearchResultsController:nil];

1.searchResultsUpdater：设置显示搜索结果的控制器。

 
        _mySearchController.searchResultsUpdater = self;

2.dimsBackgroundDuringPresentation：设置开始搜索时背景显示与否

1	`_mySearchController.dimsBackgroundDuringPresentation = NO;`

3.[searchBar sizeToFit]:设置searchBar位置自适应

1	`[_mySearchController.searchBar sizeToFit];`

4.设置searchBar为UITableView的头部视图

1	`self.myTableView.tableHeaderView = self.mySearchController.searchBar;`

5.UISearchResultsUpdating:代理方法 －(void)updateSearchResultsForSearchController:(UISearchController *)searchController

话不多说，直接上代码

@interface ViewController ()
             
@property (nonatomic, strong) UITableView *myTableView;
@property (nonatomic, strong) NSMutableArray *visableArray;
@property (nonatomic, strong) NSMutableArray *filterArray;
@property (nonatomic, strong) NSMutableArray *dataSourceArray;
@property (nonatomic, strong) UISearchController *mySearchController;
 
@end
 
@implementation ViewController
             
- (void)viewDidLoad {
    [super viewDidLoad];
     
    [self initial];
}
 
- (void)initial{
    self.dataSourceArray = [NSMutableArray array];
    self.filterArray = [NSMutableArray array];
    for (int i = 0; i < 26; i++) {
        for (int j = 0; j < 4; j++) {
            NSString *str = [NSString stringWithFormat:@"%c%d", 'A'+i, j];
            [self.dataSourceArray addObject:str];
        }
    }
     
    self.visableArray = self.dataSourceArray;
     
    self.myTableView = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];
    _myTableView.delegate = self;
    _myTableView.dataSource = self;
    [self.view addSubview:_myTableView];
     
    self.mySearchController = [[UISearchController alloc] initWithSearchResultsController:nil];
    _mySearchController.searchResultsUpdater = self;
    _mySearchController.dimsBackgroundDuringPresentation = NO;
    [_mySearchController.searchBar sizeToFit];
     
    self.myTableView.tableHeaderView = self.mySearchController.searchBar;
}
 
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    if (!_visableArray || _visableArray.count == 0) {
        _visableArray = _dataSourceArray;
    }
    return _visableArray.count;
}
 
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"identifier"];
     
    if (!cell) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"identifier"];
    }
     
    cell.textLabel.text = [_visableArray objectAtIndex:indexPath.row];
     
    return cell;
}
 
- (void)updateSearchResultsForSearchController:(UISearchController *)searchController{
    NSString *filterString = searchController.searchBar.text;
     
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF contains [c] %@", filterString];
     
    self.visableArray = [NSMutableArray arrayWithArray:[self.dataSourceArray filteredArrayUsingPredicate:predicate]];
     
    [self.myTableView reloadData];
}

当需要使用Push，现实详细信息等情况的时候，需要将searchBar隐藏。可以将active属性设置为NO。

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
    if ([segue.identifier isEqualToString:@"tablePush"])
    {
        if ([segue.destinationViewController isKindOfClass:[CodePushViewController class]])
        {
            CodePushViewController *destVC = (CodePushViewController *)segue.destinationViewController;

            destVC.labelName = [showList objectAtIndex:[[tablesView indexPathForSelectedRow] row]];

            searchC.active = NO ;
        }
    }
}