- (void)keyboardWillHide:(NSNotification *)n
{
    NSDictionary *userInfo = [n userInfo];
    CGSize keyboardSize = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;


    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3];
    CGRect viewRect = [[self view] frame];
    viewRect.origin.y += keyboardSize.height;
    [[self view] setFrame:viewRect];
    [UIView commitAnimations];
    keyboardIsShown = NO;
}

- (void)keyboardWillShow:(NSNotification *)n
{
    if (keyboardIsShown) {
        return;
    }
    NSDictionary *userInfo = [n userInfo];
    CGSize keyboardSize = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3];
    CGRect viewRect = [[self view] frame];
    viewRect.origin.y -= keyboardSize.height;
    [[self view] setFrame:viewRect];
    [UIView commitAnimations];
    keyboardIsShown = YES;

}