IOS键盘监听

   键盘消失

 [[NSNotificationCenterdefaultCenter]  addObserver:selfselector:@selector(keyboardWasHidden:) name:UIKeyboardDidHideNotificationobject:nil];

   键盘出现

 [[NSNotificationCenterdefaultCenter]  addObserver:selfselector:@selector(keyboardWasShow:) name:UIKeyboardDidShowNotification object:nil];

所有key值

UIKIT_EXTERNNSString *const UIKeyboardWillShowNotification;

UIKIT_EXTERNNSString *const UIKeyboardDidShowNotification; 

UIKIT_EXTERNNSString *const UIKeyboardWillHideNotification; 

UIKIT_EXTERNNSString *const UIKeyboardDidHideNotification;

触发方法

- (void)keyboardWillShow:(NSNotification *)notification 

{  

    CGPoint beginCentre = [[[notification userInfo] valueForKey:UIKeyboardCenterBeginUserInfoKey] CGPointValue]; 

    CGPoint endCentre = [[[notification userInfo] valueForKey:UIKeyboardCenterEndUserInfoKey] CGPointValue]; 

    CGRect keyboardBounds = [[[notification userInfo] valueForKey:UIKeyboardBoundsUserInfoKey] CGRectValue]; 

    CGRect keyboardFrames = [[[notification userInfo] valueForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue]; 

    UIViewAnimationCurve animationCurve = [[[notification userInfo] valueForKey:UIKeyboardAnimationCurveUserInfoKey] intValue]; 

    NSTimeInterval animationDuration = [[[notification userInfo] valueForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue]; 

} 

＊＊若有警告可将key值写为@""中