将SearchBar添加到NavigationBar Objective-C iOS 9

Question

我觉得这个标题是很自我解释的。我有一个嵌入在导航控制器中的tableView，并希望将一个搜索栏添加到导航栏。我认为iOS 9中关于搜索栏控制器的东西发生了变化，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

通过故事板添加它。在视图控制器场景中添加搜索栏，如退出并添加第一响应者，然后将导航项的titleView添加到搜索栏。

Answer 2

//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; 

//对于iOS8上/ ios9使用下面的代码

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 3

如果您使用的是UISearchDisplayController，这应该工作。

Apple Docs

searchDisplayController.displaysSearchBarInNavigationBar = true