键盘完成键动作swift iOS不起作用

问题描述

我是 stackoverflow 的新手，我对新的 swift 代码有疑问.我已经用完成"自定义了键盘上的返回按钮，但是当我点击它时，什么都不会发生......我怎样才能在点击它时隐藏键盘?我添加了一个代码(在此站点上找到)，用于在您点击某处而不是键盘时隐藏键盘，但我无法通过点击完成"按钮来自定义它...谢谢！

I'm new in stackoverflow, I have a problem with new swift code.I have custom the return button on keyboard with "Done", but when I tap on it, don't befall anything... How can I hide the keyboard on tap it?I have added a code (found on this site) for hide the keyboard when you tap somewhere ,not in the keyboard, but I can't custom it with tap on "done" button... Thank you before!!

推荐答案

你需要实现当你点击完成按钮时调用的委托方法:

You need to implement delegate method which is called when you hit done button:

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

你还需要遵守 UITextFieldDelegate 协议:

You also need to conform to UITextFieldDelegate protocol:

// I assume you override UIViewController class. If not add UITextFieldDelegate to your class
class MyViewController: UIViewController, UITextFieldDelegate

最后一件事是将你的类设置为文本字段委托:

The last thing is set up your class to be a text field delegate:

textField.delegate = self

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