ios - UISearchBar 范围空白

Question

我有 UISearchController在我的应用程序中:

-(void)setSearchBar {
    self.resultsController = [[UITableViewController alloc] initWithStyle:UITableViewStylePlain];
    [self.resultsController.tableView registerClass:UITableViewCell.self forCellReuseIdentifier:@"SearchTitleCell"];
    self.resultsController.tableView.dataSource = self;
    self.resultsController.tableView.delegate = self;

    self.searchController = [[UISearchController alloc] initWithSearchResultsController:self.resultsController];
    [self.searchController setSearchResultsUpdater:self];
    [self.searchController setDelegate:self];

    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"9.1")) {
        self.searchController.obscuresBackgroundDuringPresentation = NO;
    }

    self.extendedLayoutIncludesOpaqueBars = YES;

    self.navigationItem.searchController = self.searchController;

    self.searchController.searchBar.delegate = self;

    self.definesPresentationContext = true;
    self.searchController.hidesNavigationBarDuringPresentation = false;

    self.searchController.searchBar.showsScopeBar = NO;
    self.searchController.searchBar.scopeButtonTitles = @[@"One", @"two", @"three"];
}

我想在 UISearchBar 时添加 Scopebar当我退出 UISearchBar 时，单击并隐藏它，所以我使用以下代码:

- (void)willPresentSearchController:(UISearchController *)searchController {
    self.searchController.searchBar.showsScopeBar = YES;
    [self.searchController.searchBar sizeToFit];
}

- (void)willDismissSearchController:(UISearchController *)searchController {
    self.searchController.searchBar.showsScopeBar = NO;
    [self.searchController.searchBar sizeToFit];
}

问题是当我关闭 UISearchBar (通过单击取消按钮)我仍然可以看到范围空白。

之前(单击搜索栏时):


之后(点击搜索栏后取消btn):


知道如何解决这个问题吗？

Answer 1

当我们为 iOS 13 添加范围栏按钮时，这是适用于我的与 SearchBar 高度相关的解决方案。

实现 - UISearchControllerDelegate 或 UISearchBar Delegate 并分配如下。
searchController.delegate = self;
searchController.SearchBar.delegate = self;

覆盖 UISearchControllerDelegate 或覆盖 UISearchBarDelegate 方法。
-(void) didPresentSearchController:(UISearchController *)searchController {
[自我resizeTableViewHeaderHeight];
}
-(void) didDismissSearchController:(UISearchController *)searchController {
[自我resizeTableViewHeaderHeight];
}
-(void) searchBarCancelButtonClicked:(UISearchBar *)searchBar
{
[自我resizeTableViewHeaderHeight];
}

根据搜索栏高度调整 TableView 标题高度 -
-(void)resizeTableViewHeaderHeight {

 UIView *headerView = self.table_view.tableHeaderView;
 CGRect frame = headerView.frame;
 frame.size.height = 56; //Make Constant and assign value to it.
 headerView.frame = frame;
 self.table_view.tableHeaderView = headerView;

}