斯威夫特3

将下面的代码添加到你的VC中

//hide keyboard when user tapps on return key on the keyboard
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
    self.view.endEditing(true);
    return false;
}

对我有用

不需要委派

你可以从UITextField为“Primary action triggers”创建一个动作出口，并在传入的sender参数上辞职第一响应者:

@IBAction func done(_ sender: UITextField) {
    sender.resignFirstResponder()
}

超级简单。

(感谢斯科特·史密斯60秒的视频，让我知道了这一点:https://youtu.be/v6GrnVQy7iA)

Add UITextFieldDelegate to the class declaration: class ViewController: UIViewController, UITextFieldDelegate Connect the textfield or write it programmatically @IBOutlet weak var userText: UITextField! set your view controller as the text fields delegate in view did load: override func viewDidLoad() { super.viewDidLoad() self.userText.delegate = self } Add the following function func textFieldShouldReturn(userText: UITextField!) -> Bool { userText.resignFirstResponder() return true; } with all this your keyboard will begin to dismiss by touching outside the textfield aswell as by pressing return key.

override func viewDidLoad() {
    super.viewDidLoad()

    let tap = UITapGestureRecognizer(target: self, action: #selector(handleScreenTap(sender:)))
    self.view.addGestureRecognizer(tap)}

然后用这个函数

func handleScreenTap(sender: UITapGestureRecognizer) {
    self.view.endEditing(true)
}

它的返回true部分只告诉文本字段是否允许返回。 你必须手动告诉文本字段解散键盘(或者它的第一个响应器是什么)，这是通过resignFirstResponder()来完成的，如下所示:

// Called on 'Return' pressed. Return false to ignore.

func textFieldShouldReturn(_ textField: UITextField) -> Bool { 
    textField.resignFirstResponder()
    return true
}

所有在一个隐藏键盘和移动键盘打开视图:Swift 5

override func viewDidLoad() {
    super.viewDidLoad()
    let tap = UITapGestureRecognizer(target: self, action: #selector(taped))
    view.addGestureRecognizer(tap)
    NotificationCenter.default.addObserver(self, selector: #selector(KeyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(KeyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
}


   override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(true)
    NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillShowNotification, object: nil)
    NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillHideNotification, object: nil)
}
 @objc func taped(){
    
    self.view.endEditing(true)
    
}

@objc func KeyboardWillShow(sender: NSNotification){
    
    let keyboardSize : CGSize = ((sender.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue.size)!
    if self.view.frame.origin.y == 0{
        self.view.frame.origin.y -= keyboardSize.height
    }
    
    
}

@objc func KeyboardWillHide(sender : NSNotification){
    
    let keyboardSize : CGSize = ((sender.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size)!
    if self.view.frame.origin.y != 0{
        self.view.frame.origin.y += keyboardSize.height
    }
    
}


func textFieldShouldReturn(_ textField: UITextField) -> Bool { 
    textField.resignFirstResponder()
    return true
}