How to get notified after the keyboard has been dismissed and closed fully

How to get notified after the keyboard has been dismissed and closed fully

I need to get notified when the keyboard is fully hidden to trigger
another event. Im using
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardDidHide:)
name:UIKeyboardDidHideNotification object:nil];
but that is telling me the moment I dismiss, not when animation is done.