ios - 单击取消按钮时隐藏 searchController searchBar

Question

我在带有 TableView 的 viewController 中实现了一个搜索 Controller ，还有一个搜索 Controller ，搜索栏在搜索按钮被录音时显示，搜索按钮是一个 UIBarButtonItem 并且搜索栏显示在导航 Controller 中，但我想要为了在点击取消按钮时消失，我尝试使用 serarchBarDelegate 协议(protocol)，但是点击这里的代码没有任何反应

    class NewsTVController: UIViewController, UITableViewDataSource, UITableViewDelegate,UISearchResultsUpdating,UISearchBarDelegate{
let searchController = UISearchController(searchResultsController: nil)
    override func viewDidLoad() {
        super.viewDidLoad()
        searchController.searchResultsUpdater = self
        definesPresentationContext = true
        searchController.dimsBackgroundDuringPresentation = false
        searchController.hidesNavigationBarDuringPresentation = true

        self.searchController.hidesNavigationBarDuringPresentation = false

        loadNews()
    }


@IBAction func searchButtonTaped(sender:UIBarButtonItem){
        print("tap inside")
        self.navigationItem.titleView = searchController.searchBar
        //self.navigationItem.rightBarButtonItem?.action = #selector(hideSearchBar(:))
       // searchController.searchBar.touchesCancelled(UITouch, with: .touchUpInside){

        //}
        //self.navigationItem.rightBarButtonItem.
    }
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
        hideSearchBar()
    }
    func hideSearchBar() {
        print("hay que escpder")
        //navigationItem.setLeftBarButtonItem(searchBarButtonItem, animated: true)
        //logoImageView.alpha = 0
        UIView.animate(withDuration: 0.3, animations: {
            self.navigationItem.titleView = nil// = self.logoImageView
            self.navigationItem.title = "Eventos"
            //self.logoImageView.alpha = 1
        }, completion: { finished in

        })
    }  
}

这是带有搜索按钮和搜索栏的导航 Controller 的图片

我想要的是，当点击取消按钮时，导航栏保持在第一张图片中，没有搜索栏。和一些提示有一种方法可以在出现搜索栏时隐藏后退按钮和搜索按钮。

Answer 1

因为我找不到实现此目标的方法，所以我找到了这个解决方案

@IBAction func searchButtonTaped(sender:UIBarButtonItem){
        print("tap inside")
        self.navigationItem.titleView = searchController.searchBar
        searchController.searchBar.setShowsCancelButton(false, animated: false)
        self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Cancelar", style: .plain, target: self, action: #selector(hideSearchBar(sender:)))
        //self.searchIcon.is
        //self.navigationItem.rightBarButtonItem?.action = #selector(hideSearchBar(:))
       // searchController.searchBar.touchesCancelled(UITouch, with: .touchUpInside){

        //}
        //self.navigationItem.rightBarButtonItem.
    }
func hideSearchBar(sender:UIBarButtonItem) {
        print("hay que escpder")
        self.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.search, target: self, action: #selector(searchButtonTaped(sender:)))
        //logoImageView.alpha = 0
        UIView.animate(withDuration: 0.3, animations: {
            self.navigationItem.titleView = nil// = self.logoImageView

            self.navigationItem.title = "Noticias"
            //self.logoImageView.alpha = 1
        }, completion: { finished in

        })
    }

现在搜索栏从导航 Controller 中消失了，搜索按钮可以正常工作，因为它链接到 Interface Builder 中的 searchButtonTaped