Keyboard 视图随键盘升高降低

 (void)viewWillAppear:(BOOL)animated

{

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

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

}

- (void)keyboardWillShow:(NSNotification *)noti

{

    //得到keyboard size

    CGRect keyboardBounds;

    [[noti.userInfo valueForKeyPath:UIKeyboardFrameEndUserInfoKey]getValue:&keyboardBounds];

    CGRect frame ;

    if (version<7.0) {

        frame = CGRectMake(0, 0, mainHeight, mainHeight-20);;

    }else{

        frame = CGRectMake(0, 0, mainHeight, mainHeight);;

    }

    [UIView beginAnimations:nil context:NULL];

    [UIView setAnimationBeginsFromCurrentState:YES];

    [UIView setAnimationDuration:0.3f];

    if (mainHeight<500) {

        frame.origin.y -= 110;

    } else {

       frame.origin.y -= 25;

    }

    _backView.frame = frame;

    [UIView commitAnimations];

}

- (void)keyboardWillHide:(NSNotification *)noti

{

    //得到keyboard size

    CGRect keyboardBounds;

    [[noti.userInfo valueForKeyPath:UIKeyboardFrameEndUserInfoKey]getValue:&keyboardBounds];

    CGRect frame ;

    if (version<7.0) {

        frame = CGRectMake(0, 0, mainHeight, mainHeight-20);;

    }else{

        frame = CGRectMake(0, 0, mainHeight, mainHeight);;

    }

    [UIView beginAnimations:nil context:NULL];

    [UIView setAnimationBeginsFromCurrentState:YES];

    [UIView setAnimationDuration:0.3f];

    _backView.frame = frame;

    [UIView commitAnimations];

}

Keyboard 视图随键盘升高降低

原文：http://blog.csdn.net/zh_2608/article/details/41750655