iOS键盘语言更改时是否有委托调用？ [英] Is there a delegate call when iOS keyboard language changes?

问题描述

我有一个场景，我希望在用户按下iOS键盘上的语言更改（地球图标）时触发处理程序。

I have a scenario where I'd like to have a handler that gets triggered when the user presses the language change(globe icon) on the keyboard for iOS.

我如何实现这一目标？

谢谢

推荐答案

以下应该工作：
您必须在代码中使用UIKeyboard通知

The following should work: You would have to use a UIKeyboard notification within your code

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

然后在你的 keyboardWillBeHidden：或类似名称方法使用答案（下面的链接），它为您返回当前所选语言的双字母代码。

Then within your keyboardWillBeHidden: or similarly named method use the answer (link below) which returns you a two letter code for the currently selected language.

链接：在iOS中获取当前的设备语言？

所以你的方法 keyboardWillBeHidden：隐藏键盘时调用方法从系统中读取当前选中的键盘语言选项。

So your method keyboardWillBeHidden: method is called when the keyboard is hidden reads from the system the keyboard language option that is currently selected.

多数民众赞成理论上，我自己没试过，祝你好运。

Thats the theory, I haven't tried this myself, good luck.

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