NSNotificationCenter

Question

Right now I'm trying to write a function to moving up frame when keyboard appears on the screen. I started to use NSNNotificationCenter. My code is working but not correctly. When keyboard appears my formView is moving up but when I start to edit next textField in formView, formView is moving up again. What's wrong with my code? Thanks.

- (void)keyboardWillShow:(NSNotification *) aNotification {
    NSDictionary *userInfo = [aNotification userInfo];

    CGRect frame = self.formView.frame;
    frame.origin.y -= 170;

    NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];
    NSTimeInterval animationDuration;

    [animationDurationValue getValue:&animationDuration];
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:animationDuration];

    formView.frame = frame;

    [UIView commitAnimations];

}

Answer 1

You should add again your 170 pixels (or whatever you calculate as suggested by Mike) to the origin.y of your view when the keyboard is disappearing. When you click on another text field, technically the current keyboard will disappear (your view does not react in any way) and a new keyboard will appear (your keyboardWillShow will be called again and you shift your view again up by 170 px).