在搜索栏外部单击时使键盘消失-SWIFT

Question

我有一个UIViewController，并且嵌入了一个搜索栏和一个集合视图。当我按搜索栏时，出现键盘。如果用户决定通过点击屏幕上除搜索栏之外的任何位置来改变主意，我希望隐藏此键盘。我尝试了以下方法但没有成功：

1. 添加敲击手势识别器

2. 使用'self.mySearchBar.endEditing（true）'

   class CollectionViewFolder: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate ,UICollectionViewDelegateFlowLayout, UISearchBarDelegate{
   
   /*** OUTLETS ***/
   @IBOutlet weak var mySearchBar: UISearchBar!
   
   
   // 1. I have tried adding a Tap Gesture Recognizer
   // TAP ON SCREEN LISTENER
   @IBAction func tapOnScreen(_ sender: UITapGestureRecognizer) {
      print("tap tap ...")
      self.mySearchBar.resignFirstResponder()
   }
   
   
   
   // 2.  Added the following to the viewDidLoad:
   override func viewDidLoad() {
      super.viewDidLoad()
   
      self.mySearchBar.endEditing(true)
    }
   
   }
   

Answer 1

您可以使用此扩展名。

extension UIViewController {
    func hideKeyboardWhenTappedAround() {
        let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(UIViewController.dismissKeyboard))
        tap.cancelsTouchesInView = false
        view.addGestureRecognizer(tap)
    }

    @objc func dismissKeyboard() {
        view.endEditing(true)
    }
}

用法。在您的viewController中：

override func viewDidLoad() {
    super.viewDidLoad()

    hideKeyboardWhenTappedAround()
}