本文介绍了检测UIKeyBoard是否正在显示的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想检测键盘是否正在显示。我发现了一些其他帖子遍历UIWindow的子视图以找到键盘，但如果这是唯一的方法，那么我会找出其他的东西。我想我也可以观察UIKeyboard通知，但我猜测那里有更清洁的解决方案。
I'd like to detect whether or not the keyboard is showing. I've found a few other posts that traverse the subviews of UIWindow to find the keyboard, but if that is the only way then I'll figure out something else. I suppose I could also observe the UIKeyboard notifications, but I'm guessing there is a cleaner solution out there.
推荐答案
我是不确定观察UIKeyboard通知时脏是什么，但它绝对胜过遍历UIWindow层次结构。
I am not sure what's "dirty" in observing UIKeyboard notifications but it definitely beats traversing UIWindow hierarchy.
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