if(viewRotated)
{
    subView.hidden = YES;
}
viewRotated = NO;

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    if(UIInterfaceOrientationIsPortrait(interfaceOrientation))
    {
        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(keyboardWillShow:)
                                                     name:UIKeyboardWillShowNotification
                                                   object:nil];
        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(keyboardWillHide:)
                                                     name:UIKeyboardWillShowNotification
                                                   object:nil];
    }
    else
    {

        [[NSNotificationCenter defaultCenter] removeObserver:self
                                                        name:UIKeyboardWillShowNotification
                                                      object:nil];
        [[NSNotificationCenter defaultCenter] removeObserver:self
                                                        name:UIKeyboardWillShowNotification
                                                      object:nil];
    }
    return YES;
}

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation