iPad：如何知道按下iPad键盘的返回键？请检查图像 [英] iPad : How to know Return key of iPad keyboard is pressed ? Please check image

问题描述

我想知道在按下以下键时将调用哪个方法。

I want to know that which method will be called when the following key is pressed.

我想在上面按键开始动作。

I want to start action on above key press.

我怎么知道这被按下了？

How do I know this is pressed ?

推荐答案

观察 UIKeyboardDidHideNotification 通知。

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];

并且......

- (void)keyboardDidHide:(NSNotification *)aNotification {

}

如果您需要在键盘开始消失之前收到通知，您也可以将其更改为 UIKeyboardWillHideNotification 。

You can also change it to UIKeyboardWillHideNotification if you need to be notified BEFORE the keyboard starts to disappear.

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