如何在返回键被击中时隐藏键盘 - 斯威夫特 [英] How to hide keyboard when return key is hit - Swift

问题描述

尝试在点击返回键时隐藏iOS键盘，但是它会停止并给出图像中看到的错误。这是我正在使用的代码：

Trying to hide the iOS keyboard when the return key is hit, but instead it halts and gives me the error seen in the image. Here's the code I'm using:

@IBOutlet weak var scoreText: UITextField!

func textFieldShouldReturn(_ scoreText: UITextField) -> Bool {
    self.view.endEditing(true)
    return false
}

推荐答案

您的问题是您没有委托textField以便使用该方法。首先，您的类必须包含 UITextFieldDelegate 协议：

Your problem is that you didn't delegate a textField in order to use that method. First, your class must include the UITextFieldDelegate protocol:

class yourClass: UIViewController, UITextFieldDelegate { ... }

并且在 viewDidLoad（）方法，也可以添加：

And in the viewDidLoad() method, add this as well:

scoreText.delegate = self

然后你必须改变这个：

func textFieldShouldReturn(_ scoreText: UITextField) -> Bool {
    self.view.endEditing(true)
    return false
}

到此：

func textFieldShouldReturn(_ scoreText: UITextField) -> Bool {
    self.view.endEditing(true)
    return true
}

最终代码：

class yourClass: UIViewController, UITextFieldDelegate {

    @IBOutlet weak var scoreText: UITextField!

    override func viewDidLoad(){
        super.viewDidLoad()
        scoreText.delegate = self
    }

    func textFieldShouldReturn(_ scoreText: UITextField) -> Bool {
        self.view.endEditing()
        return true
    }
}

如果这不起作用，则问题不在于 textFieldShouldReturn（）函数。请检查您的插座连接。

If this is not working, the problem is not the textFieldShouldReturn() function. Please check your outlet connections.

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