你可以把它放在任何地方，但不能放在UIButton中

 func TextFieldEndEditing(text fiend name: UITextField!) -> Bool
{
    return (false)
}

然后你可以把这段代码放在一个按钮中(也是一个例子):

self.view.endEditing(true)

这对我很有效

下面是Swift 3.0版本对peacetype注释的更新:

textField.addTarget(nil, action:Selector(("firstResponderAction:")), for:.editingDidEndOnExit)

简单的Swift 3解决方案: 将这个函数添加到以文本字段为特征的视图控制器中:

@IBAction func textField(_ sender: AnyObject) {
    self.view.endEditing(true);
}

然后打开你的助理编辑器，确保你的主。Storyboard位于视图的一侧，所需的视图controller.swift文件位于另一侧。单击一个文本字段，然后从右边的实用工具面板“显示连接检查器”选项卡中选择。从“Did End on Exit”控件拖动到swift文件中的上述函数。重复该场景中的任何其他文本字段，并链接到相同的函数。

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
}

@RSC

对我来说，Xcode Version 6.2 (6C86e)的关键添加是override func viewDidLoad()

 self.input.delegate = self;

我试着用返回键让它工作了几个小时，直到我找到了你的帖子，RSC。谢谢你！

此外，如果你想隐藏键盘，如果你触摸屏幕上的其他地方:

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
        self.view.endEditing(true);
    }

在你正在使用的视图控制器中:

//suppose you are using the textfield label as this

@IBOutlet weak var emailLabel: UITextField!
@IBOutlet weak var passwordLabel: UITextField!

//then your viewdidload should have the code like this
override func viewDidLoad() {
        super.viewDidLoad()

        self.emailLabel.delegate = self
        self.passwordLabel.delegate = self

    }

//then you should implement the func named textFieldShouldReturn
 func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true
    }

// -- then, further if you want to close the keyboard when pressed somewhere else on the screen you can implement the following method too:

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        self.view.endEditing(true);
    }