Question

我正在尝试过滤UISearchController中的搜索栏，但它没有过滤？

@interface TableViewController () <UISearchBarDelegate>

@property (nonatomic, strong) UISearchController *searchController;
@property (nonatomic, strong) NSMutableArray *searchResults; // Filtered search results
@property (nonatomic, strong) NSMutableArray *objects;

@end

@implementation TableViewController


- (void)viewDidLoad {
    [super viewDidLoad];

    self.searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
    self.searchController.searchBar.frame = CGRectMake(0, 0, 0, 44.0);
    self.searchController.searchBar.delegate = self;

    self.tableView.tableHeaderView = self.searchController.searchBar;

    self.definesPresentationContext = YES;

    self.searchController.searchBar.barTintColor = [UIColor yellowColor];

    self.objects = [@[@"iOS",@"is",@"kool"]mutableCopy];

    [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"Cell"];

}

- (void)searchThroughResults
{
    NSPredicate *resultsPredicate = [NSPredicate predicateWithFormat:@"SELF contains [search] %@", self.searchController.searchBar.text];

    [self.searchResults filteredArrayUsingPredicate:resultsPredicate];
}

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
    [self searchThroughResults];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - Table view data source


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    // Return the number of rows in the section.

    if (tableView == self.tableView) {
        return self.objects.count;
    } else {
        [self searchThroughResults];
        return self.searchResults.count;
    }
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];

    // Configure the cell...
    if (!cell) {
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Cell"];
        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    }

    if (tableView == self.tableView) {
        cell.textLabel.text = self.objects[indexPath.row];
    } else {
        cell.textLabel.text = self.searchResults[indexPath.row];
    }

    return cell;
}

我做错了什么？为什么tableView没有被过滤？我也发布在：https://github.com/Kalson/iOS-Study/tree/master/SearchBar

Answer 1

也许您需要在更改Array self.searchResults后重新加载UITableView？尝试

- (void)searchThroughResults
{
    NSPredicate *resultsPredicate = [NSPredicate predicateWithFormat:@"SELF contains [search] %@", self.searchController.searchBar.text];
    [self.searchResults filteredArrayUsingPredicate:resultsPredicate];
    [self.tableView reloadData];
}

Answer 2

虽然您已添加了UISearchBarDelegate，但您尚未添加UISearchControllerDelegate或UISearchResultsUpdating委托。因此，请将这两个添加到角度括号中，并在.m文件顶部用逗号分隔。

Answer 3

尝试在检查if (tableView == self.tableView)的if语句中添加断点。如果它没有传递那个if语句，那么用这个if (![self.searchController.searchBar.text isEqualToString:@""]) {替换他。我尝试过一些简单的项目并且有效。告诉我它是否对你有帮助，如果我不发布我的测试项目的更多代码。

使用UISearchController过滤UITableView？

3 个答案: