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我可以在 UISearchDisplayController 中插入按钮吗？

发布于 2024-10-31 05:56:35 字数 90 浏览 2 评论 0原文

当用户点击搜索栏，没有输入任何文本，并且屏幕变暗（但桌面视图尚未出现）时，我想在屏幕上放置一个按钮以允许用户导航离开到一些其他功能。这可能吗？

谢谢！

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北凤男飞 2024-11-07 05:56:35

这是相当棘手的。 _dimmingView 是 searchDisplayController 私有的，它位于所有子视图之上。您可以做的是每次出现时用自定义视图覆盖它（[searchString length] == 0 和 DidBeginSearch）

（tempView 的框架设置为放置在表的 tableViewHeader 上的 UISearchBar）

- (void)viewDidLoad {
    tempView = [[UIView alloc] initWith...];
    // tempView setup
    ...
}

- (void)searchDisplayControllerDidBeginSearch:(UISearchDisplayController *)controller {
    [tempView setFrame:CGRectMake(0, self.searchDisplayController.searchBar.frame.size.height, 320, self.searchDisplayController.searchResultsTableView.frame.size.height)];
    [self.searchDisplayController.searchContentsController.view addSubview:tempView];
    ...
}

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
    if ([searchString length] == 0) 
         [self.searchDisplayController.searchContentsController.view addSubview:tempView];
    else 
         [tempView removeFromSuperview];
    ...
}

- (void)searchDisplayControllerDidEndSearch:(UISearchDisplayController *)controller {
    if (tempView && tempView.superview) 
        [tempView removeFromSuperview];
    ...
}

注意：我尝试在 DidBeginSearch 上创建一个新实例并释放它在 DidEndSearch 上，并且仅适用于第一次调用！奇怪...

希望这有帮助

This is quite tricky. The _dimmingView is private to the searchDisplayController and it goes above all subviews. What you can do is cover it with your custom view every time it appears ([searchString length] == 0 and DidBeginSearch)

(tempView's frame is set for UISearchBar placed on table's tableViewHeader)

- (void)viewDidLoad {
    tempView = [[UIView alloc] initWith...];
    // tempView setup
    ...
}

- (void)searchDisplayControllerDidBeginSearch:(UISearchDisplayController *)controller {
    [tempView setFrame:CGRectMake(0, self.searchDisplayController.searchBar.frame.size.height, 320, self.searchDisplayController.searchResultsTableView.frame.size.height)];
    [self.searchDisplayController.searchContentsController.view addSubview:tempView];
    ...
}

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
    if ([searchString length] == 0) 
         [self.searchDisplayController.searchContentsController.view addSubview:tempView];
    else 
         [tempView removeFromSuperview];
    ...
}

- (void)searchDisplayControllerDidEndSearch:(UISearchDisplayController *)controller {
    if (tempView && tempView.superview) 
        [tempView removeFromSuperview];
    ...
}

Notes: I tried creating a new instance on DidBeginSearch and releasing it on DidEndSearch, and it worked only for the 1st call! Weird...

Hope this helps

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