Question

自动演示UISearchController之间的行为不同，并且自己呈现搜索控制器。

@implementation MyViewComtroller

// click search barbutton on right of navigationBar
- (void)searchAction:(id)sender {
    ArticleSearchViewController *searchResultsController = [[ArticleSearchViewController alloc] init];
    UISearchController *searchController = [[UISearchController alloc] initWithSearchResultsController:searchResultsController];
    searchController.searchResultsUpdater = searchResultsController;
    searchController.searchBar.delegate = searchResultsController;
    searchController.delegate = searchResultsController;
    searchController.hidesNavigationBarDuringPresentation = NO;
    [self presentViewController:searchController animated:YES completion:nil];
}

@end

@implementation ArticleSearchViewController

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    ArticleDetailController * articleDetailController = [ArticleDetailController new];
   [(UINavigationController *)self.presentingViewController pushViewController:articleDetailController animated:YES];
}

@end

推送操作发生在UISearchController下面。

Answer 1

您正在以错误的方式呈现搜索控制器。看一下文档的一部分。

您可以将搜索控制器与现有视图配合使用控制器。如果您有一个具有可搜索内容的视图控制器，将UISearchController对象的搜索栏合并到您的查看控制器的界面。当用户与该搜索进行交互时条形图，搜索控制器自动显示新视图控制器，包含您指定的搜索结果。

而不是在主控制器中：

[self presentViewController:searchController animated:YES completion:nil];

你应该在iOS 11上这样做：

self.definesPresentationContext = YES;
self.navigationItem.searchController = searchController;

或者在iOS 11之前：

self.definesPresentationContext = YES;
self.navigationItem.titleView = searchController.searchBar;

或者在显示的视图层次结构中放置searchController.searchBar的其他任何位置。

您还应该在viewDidLoad之类的地方设置搜索控制器，而不是按下按钮。

您在navigationController中获得对ArticleSearchViewController的引用的方式必须更新为：

[self.presentingViewController.navigationController pushViewController:articleDetailController animated:YES];

使用可搜索内容查看控制器：

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self.view setBackgroundColor:[UIColor blackColor]];

    UIStoryboard *sb = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    ArticleSearchViewController *searchResultsController = [sb instantiateViewControllerWithIdentifier:@"ArticleSearchViewController"];
    UISearchController *searchController = [[UISearchController alloc] initWithSearchResultsController:searchResultsController];
    searchController.searchResultsUpdater = searchResultsController;
    searchController.searchBar.delegate = searchResultsController;
    searchController.delegate = searchResultsController;
    searchController.hidesNavigationBarDuringPresentation = NO;
//    [self presentViewController:searchController animated:YES completion:nil]; //WRONG
    self.definesPresentationContext = YES;
    self.navigationItem.searchController = searchController;
}

@end

结果控制器：

@implementation ArticleSearchViewController

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    UIViewController * articleDetailController = [UIViewController new];
    [self.presentingViewController.navigationController pushViewController:articleDetailController animated:YES];
}

- (void)updateSearchResultsForSearchController:(UISearchController *)searchController {
    // update appropriately
}

@end

Answer 2

这是一个更好的答案：

definesPresentationContext = true

只需在您的MyViewController

中写上

UISearchController不会在前面但在UISearchController下面推送viewcontroller

2 个答案: