键盘通知未正确触发

Question

我正在尝试在键盘即将显示时收到通知，但目前它正在显示键盘后触发。

这是我的通知注册：

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

Answer 1

尝试使用：

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

将UIKeyboardDidShowNotification更改为UIKeyboardWillShowNotification