ios - 使用 Swift 触摸任意位置关闭 iOS 键盘

Question

我一直在寻找这个，但我似乎无法找到它。我知道如何使用 Objective-C 关闭键盘，但我不知道如何使用 Swift 来关闭键盘？有人知道吗？

Answer 1

override func viewDidLoad() {
    super.viewDidLoad()
          
    //Looks for single or multiple taps. 
     let tap = UITapGestureRecognizer(target: self, action: #selector(UIInputViewController.dismissKeyboard))

    //Uncomment the line below if you want the tap not not interfere and cancel other interactions.
    //tap.cancelsTouchesInView = false 

    view.addGestureRecognizer(tap)
}

//Calls this function when the tap is recognized.
@objc func dismissKeyboard() {
    //Causes the view (or one of its embedded text fields) to resign the first responder status.
    view.endEditing(true)
}

如果您要在多个 UIViewControllers 中使用此功能，这是执行此任务的另一种方法:

// Put this piece of code anywhere you like
extension UIViewController {
    func hideKeyboardWhenTappedAround() {
        let tap = UITapGestureRecognizer(target: self, action: #selector(UIViewController.dismissKeyboard))
        tap.cancelsTouchesInView = false            
        view.addGestureRecognizer(tap)
    }
    
    @objc func dismissKeyboard() {
        view.endEditing(true)
    }
}

现在在每个 UIViewController 中，你所要做的就是调用这个函数:

override func viewDidLoad() {
    super.viewDidLoad()
    self.hideKeyboardWhenTappedAround() 
}

此函数作为标准函数包含在我的存储库中，其中包含许多有用的 Swift 扩展，例如这个，查看:https://github.com/goktugyil/EZSwiftExtensions