UIKeyBoard高度的监控

监控KeyBoard

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

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

显示的实现

- (void) keyBoardWillShow:(NSNotification*) notification

{

    

    NSDictionary *userInfo = [notification userInfo];

    

    // Get the origin of the keyboard when it's displayed.

    NSValue* aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

    

    // Get the top of the keyboard as the y coordinate of its origin in self's view's coordinate system. The bottom of the text view's frame should align with the top of the keyboard's final position.

    CGRect keyboardEndFrame = [aValue CGRectValue];

    CGRect keyboardFrame = [self.view convertRect:keyboardEndFrame toView:nil];

    CGFloat keyboardHeight = keyboardFrame.size.height;    

}