如何检测iPad用户点击键盘隐藏按钮？ [英] How to detect iPad user tap on keyboard hide button?

问题描述

在我的应用程序中，我有一些围绕隐藏和显示键盘的复杂逻辑。我有兴趣检测用户（谁拥有iPad）专门点击iPad键盘上的隐藏按钮：

In my app I have some complex logic surrounding the hiding and showing of the keyboard. I am interested in detecting when the user (who has an iPad) specifically taps on the iPad keyboard hide button:

我不对检测键盘何时应该感兴趣隐藏，仅当用户实际物理上点击此按钮时。有什么建议吗？

I am not interested in detecting when the keyboard is supposed to hide, only when the user actually physically taps on this button. Any suggestions?

谢谢！

推荐答案

我在寻找一个完全相同的解决方案，我确实在文档中找到了它。你得到一整套键盘通知：

I was looking for an exact same solution, and I did found it in the documentation after all. You get a whole package of keyboard notifications:

- UIKeyboardWillShowNotification
- UIKeyboardDidShowNotification
- UIKeyboardWillHideNotification
- UIKeyboardDidHideNotification
- UIKeyboardWillChangeFrameNotification
- UIKeyboardDidChangeFrameNotification

我对UIKeyboardWillHideNotification感兴趣。所以刚刚实现：

I was interested in "UIKeyboardWillHideNotification". So just implemented:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(KeyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

Etvoilà！希望这会有所帮助，即使这是一年的迟到答案。

Et voilà! Hope this helps, even it's an year late answer.

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