以编程方式检查iPhone键盘是否在屏幕上

Question

  

可能重复：
  How to programatically check whether a keyboard is present in iphone app?
  Detect if UIKeyBoard is Showing

有没有办法以编程方式检查iPhone的键盘是否在屏幕上？

Answer 1

基本上，您想要添加NSNotificationCenter观察者：

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow) name:UIKeyboardDidShowNotification object:nil];