将 UIView 添加到您的布局.这将是您的 UISearchBar 的容器.然后以编程方式实例化 UISearchController，然后将搜索栏添加到容器中:

Add a UIView to your layout. That will be the container for your UISearchBar. Then programmatically instantiate the UISearchController and then add the searchbar to the container:

let searchController = UISearchController(searchResultsController: searchResultsController)
searchBarContainer.addSubview(searchController.searchBar)