将搜索栏添加到导航栏 Objective-C iOS 9

Question

我认为标题很容易解释。我在导航控制器中嵌入了一个 tableView，并希望在导航栏中添加一个搜索栏。我认为 iOS 9 中关于搜索栏控制器的事情发生了一些变化，所以请记住，这必须适用于 iOS 9。这就是我所拥有的。毫无疑问这是错误的。

 UISearchController *searchController = [[UISearchController alloc]init];
self.searchController.searchBar.barTintColor = [UIColor whiteColor];
[self.navigationController addChildViewController:searchController];

Answer 1

//This method has deprecated in ios 8. So, before ios 8 you can use this.

UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectZero];
[searchBar sizeToFit];

UISearchDisplayController *searchDisplayController= [[UISearchDisplayController alloc] initWithSearchBar:searchBar
                                    contentsController:self];
self.searchDisplayController.searchResultsDelegate = self;
self.searchDisplayController.searchResultsDataSource = self;
self.searchDisplayController.delegate = self;
self.navigationItem.titleView = searchDisplayController.searchBar;

// ios8/ios9使用如下代码

UISearchController *searchController = [[UISearchController alloc] initWithSearchResultsController:self];
// Use the current view controller to update the search results.
searchController.searchResultsUpdater = self;
// Install the search bar as the table header.
self.navigationItem.titleView = searchController.searchBar;
// It is usually good to set the presentation context.
self.definesPresentationContext = YES;

Answer 2

如果您使用的是 UISearchDisplayController，这应该可以工作。

Apple Docs

searchDisplayController.displaysSearchBarInNavigationBar = true

Answer 3

通过情节提要添加它。在视图控制器场景中添加搜索栏，例如添加退出和第一响应者，然后将导航项的 titleView 提供给搜索栏。