- (void)keyboardWillShow:(NSNotification *)notification
{
//动画效果
NSDictionary *userInfo = [notification
userInfo];
NSValue* aValue = [userInfoobjectForKey:UIKeyboardFrameEndUserInfoKey];
CGRect keyboardRect = [aValue
CGRectValue];
NSValue *animationDurationValue = [userInfoobjectForKey:UIKeyboardAnimationDurationUserInfoKey];
}
// x:0.000000,y:264.000000,width:320.000000,heigh:216.000000