在UISearchController的search栏上隐藏取消button

我试图隐藏在UISearchControllersearch栏的取消button，但不幸的是在viewDidLoad（）中设置以下内容不起作用：

override func viewDidLoad() { super.viewDidLoad() searchResultsTableController = UITableViewController() searchResultsTableController.tableView.delegate = self searchController = UISearchController(searchResultsController: searchResultsTableController) searchController.searchResultsUpdater = self searchController.searchBar.sizeToFit() searchResultsView.tableHeaderView = searchController.searchBar searchController.delegate = self searchController.dimsBackgroundDuringPresentation = false searchController.searchBar.delegate = self searchController.searchBar.searchBarStyle = .Minimal searchController.searchBar.showsCancelButton = false definesPresentationContext = true } 

我也尝试在这个委托方法中使用上面的代码：

 func didPresentSearchController(searchController: UISearchController) { searchController.searchBar.showsCancelButton = false } 

这种方法的工作原理，但隐藏它之前会显示取消button，这是不理想的。 有什么build议么？

Answer 1

我build议按照build议子类化UISearchBar和UISearchController ：

CustomSearchBar.swift

 import UIKit class CustomSearchBar: UISearchBar { override func layoutSubviews() { super.layoutSubviews() setShowsCancelButton(false, animated: false) } } 

CustomSearchController.swift

 import UIKit class CustomSearchController: UISearchController, UISearchBarDelegate { lazy var _searchBar: CustomSearchBar = { [unowned self] in let result = CustomSearchBar(frame: CGRectZero) result.delegate = self return result }() override var searchBar: UISearchBar { get { return _searchBar } } } 

Answer 2

在search栏隐藏取消button的委托方法，并设置你的委托searchController.searchBar.delegate=self UISearchBarDelegate

 func searchBarTextDidBeginEditing(searchBar: UISearchBar) { } func searchBarTextDidEndEditing(searchBar: UISearchBar) { } 

Answer 3

尝试UISearchBar并实现：

 override func layoutSubviews() { super.layoutSubviews() self.setShowsCancelButton(false, animated: false) } 

这SO线程可能会帮助你在这个方向更多。