UISearchController table 查看结果为空

Question

我一直在为这个问题苦苦挣扎。一些帖子处理了这个问题，但在我的案例中没有出现解决方案。

问题是：我想用 UISearchController 方法显示一些结果。我的带有自定义单元格的原始 table 视图在我的所有条目都在此处并按我的需要显示的意义上完美运行。

当我使用带有范围按钮的搜索栏时，再次一切正常，我过滤的结果正确地存储在列表中，甚至我的自定义单元格也得到了它需要的一切，从某种意义上说，当我检查单元格属性，它对应过滤条目...

但让我发疯的是显示的 "new" table 视图（带有结果的视图）是空的（从某种意义上说，所有视图都充满了空行）尽管过滤条目在这里并且 cellForRowAtIndexPath 正在执行它的工作（至少在它必须显示之前）。

有人可以帮我解决这个问题吗？

代码：

- (void)updateSearchResultsForSearchController:(UISearchController *)searchController {

    NSPredicate *predicate;

    NSString *searchText = searchController.searchBar.text;
    NSInteger scope = searchController.searchBar.selectedScopeButtonIndex;

    if (scope == 0) {
        predicate = [NSPredicate predicateWithFormat:@"SELF.drugName contains[c] %@", searchText];

    }

    if (scope == 1) {
        predicate = [NSPredicate predicateWithFormat:@"SELF.marque contains[c] %@", searchText];

    }

    else if (scope == 2) {
        predicate = [NSPredicate predicateWithFormat:@"SELF.classFamily contains[c] %@", searchText];

    }

    NSMutableArray *tempArray = [NSMutableArray arrayWithArray:[[[SubstrateStore sharedStore] allSubstrates] filteredArrayUsingPredicate:predicate]];
    self.filteredResults = [NSMutableArray arrayWithArray:tempArray];

    [self.tableView reloadData]; // -> I tried to remove, to change the table view, etc, it does change anything
}

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

    TableViewCell *cell = (TableViewCell *)[tableView dequeueReusableCellWithIdentifier:kCellIdentifier forIndexPath:indexPath];

    Substrate *substrate = self.products[indexPath.row];

    if (_searchController.active && ![_searchController.searchBar.text isEqualToString:@""]) {

        substrate = self.filteredResults[indexPath.row];
    }

    [self configureCell:cell forProduct:substrate]; // when I check cell attributes (drugName,...), they are there...

    return cell; // it works when no search is done (with the native table view) but the cell is not displayed when using the search bar (empty table view)
}

我需要更多代码...

谢谢！

Answer 1

您的问题是您正在重新加载 self.tableView 而不是 searchController 的 tableView。

确保您还正确地将 searchController 的 tableView 的数据源和委托分配给了自己。

Answer 2

- (void)viewDidLoad {
    [super viewDidLoad];

    self.products = [[SubstrateStore sharedStore] allSubstrates];
    self.filteredResults = [[NSArray alloc] init];

    self.tableView.tableFooterView = [[UIView alloc] initWithFrame:CGRectZero];

    // SearchBar
    _resultsTableController = [[ResultsTableViewController alloc] init];
    _searchController = [[UISearchController alloc] initWithSearchResultsController:self.resultsTableController];
    self.searchController.searchResultsUpdater = self;
    [self.searchController.searchBar sizeToFit];
    self.tableView.tableHeaderView = self.searchController.searchBar;
    self.searchController.searchBar.showsScopeBar = YES;
    self.searchController.searchBar.scopeButtonTitles = [NSArray arrayWithObjects:@"DCI", @"Nom de marque", @"Classe", nil];

    // we want to be the delegate for our filtered table so didSelectRowAtIndexPath is called for both tables
    self.resultsTableController.tableView.delegate = self;
    self.searchController.delegate = self;
    self.searchController.dimsBackgroundDuringPresentation = NO; // default is YES
    self.searchController.searchBar.delegate = self; // so we can monitor text changes + others

    // Search is now just presenting a view controller. As such, normal view controller
    // presentation semantics apply. Namely that presentation will walk up the view controller
    // hierarchy until it finds the root view controller or one that defines a presentation context.
    //
    self.definesPresentationContext = YES;  // know where you want UISearchController to be displayed

}

如果有帮助的话，这是更多代码

UISearchController table 查看结果为空

UISearchController table view results empty

uitableview

ios

is-empty

uisearchcontroller