How to get time of keyboard show/dismiss animation?

Question

I need do some animation with keyboard animation.

In iOS development,we can get time from keyboard notification.

NSDictionary *userInfo = paramNotification.userInfo;
NSValue * value = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
CGRect  keyboardsize = value.CGRectValue;
CGFloat keyH = keyboardsize.size.height;
NSNumber *time = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];