// 键盘最终的frame CGRect keyboardF = [note.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue]; // 动画时间 CGFloat duration = [note.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue]; [UIView animateWithDuration:duration animations:^{ }];
原文：http://www.cnblogs.com/MrTao/p/5130395.html