如何在uitextfield或按钮之外点击退出键盘

Posted 2023-03-12

【中文标题】如何在uitextfield或按钮之外点击退出键盘

【英文标题】：How to exit keyboard on tap outside of uitextfield or button

【发布时间】：2020-07-04 18:56:35

【问题描述】：

当不点击 uitextfield 或不点击显示/隐藏密码按钮时，我需要能够从键盘中点击。

我以前使用此代码来执行此操作：

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)
    

但问题在于，即使单击显示/隐藏密码眼睛图标，它也会从键盘中弹出。我用于显示/隐藏图标的代码是这样的：

extension UITextField 
    func showhidepasswordbutton(image: UIImage = UIImage(systemName: "eye.slash")!) 
        let button = UIButton(type: .custom)
        button.setImage(image, for: .normal)
        button.imageEdgeInsets = UIEdgeInsets(top: 0, left: -16, bottom: 0, right: 0)
        button.frame = CGRect(x: CGFloat(self.frame.size.width - 25), y: CGFloat(5), width: CGFloat(25), height: CGFloat(25))
        button.addTarget(self, action: #selector(self.refreshforshowhide), for: .touchUpInside)
        button.tintColor = .darkGray
        self.rightView = button
        self.rightViewMode = .always
        
        
    
    
    @IBAction func refreshforshowhide(_ sender: Any) 
        print("ok")
        
        if self.isSecureTextEntry == true 
            self.togglePasswordVisibility()
            showhidepasswordbutton(image: UIImage(systemName: "eye")!)
            
         else if self.isSecureTextEntry == false 
            self.togglePasswordVisibility()
            showhidepasswordbutton(image: UIImage(systemName: "eye.slash")!)
            
        
        
    
    func togglePasswordVisibility() 
        let temptext = self.text
        isSecureTextEntry.toggle()
        self.text = ""
        self.text = temptext
        
    
    

抱歉代码乱七八糟，刚刚写了显示/隐藏密码代码。

【参考方案1】：

您可以使用UIGestureRecognizerDelegate 中的gestureRecognizer(_:, shouldReceive:) 方法排除对子视图的点击。

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

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

    public func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool 
        touch.view?.isDescendant(of: view) == false // will return false if touch was received by a subview
    

更新：您可以使用 touch.view == view 代替 touch.view?.isDescendant(of: view) == false。