Swift UITextFieldShouldReturn返回键点击 [英] Swift UITextFieldShouldReturn Return Key Tap

问题描述

（iOS8，Xcode6，Swift）
使用Swift，如何在返回按钮上点击？

(iOS8, Xcode6, Swift) Using Swift, how do I capture a tap on the "Return" button?

以下文档link使用 textFieldShouldReturn 方法指定：

The doc at the following link specifies using the textFieldShouldReturn method:

// Swift
@optional func textFieldShouldReturn(_ textField: UITextField!) -> Bool

我挂断的地方是_ textField部分。我使用Storyboard创建了文本字段。如何捕获此特定文本字段的通知？我是否需要创建一个新类并将其设置为此文本字段的委托？我是否为文件分配了一个名称，然后以某种方式挂钩？

Where I'm hung up is in the "_ textField" part. I've created the text field using Storyboard. How do I capture notifications for this specific text field? Do I need to create a new class and set it as a delegate for this text field? Do I assign the text filed a name, and then somehow hook into it?

https://developer.apple.com/documentation/uikit/uitextfielddelegate/1619603-textfieldshouldreturn

推荐答案

class ViewController: UIViewController,UITextFieldDelegate //set delegate to class

@IBOutlet var txtValue: UITextField //create a textfile variable

override func viewDidLoad() {
   super.viewDidLoad() 
   txtValue.delegate = self //set delegate to textfile 
}

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

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