title: UITextField nextResponder only works once
body: <p>I have multiple UITextField's and am trying to click next to switch between them.  I have set the tags for each one from 1-4.  When I run my code, it moves to the second one, but won't move to the third.  If I jump textField.tag + 2; it will jump to the third field, but it doesn't move on from there.  Here is my code:</p>
  
  <pre><code>- (BOOL)textFieldShouldReturn:(UITextField *)textField
  {
  theScrollView.frame = CGRectMake(theScrollView.frame.origin.x, theScrollView.frame.origin.y,
                                   theScrollView.frame.size.width, theScrollView.frame.size.height + 265 - 50); //resize
  
  NSInteger nextTag = textField.tag + 1;
  // Try to find next responder
  UIResponder* nextResponder = [textField.superview viewWithTag:nextTag];
  if (nextResponder) {
      // Found next responder, so set it.
      [nextResponder becomeFirstResponder];
  } else {
      // Not found, so remove keyboard.
      [textField resignFirstResponder];
  }
  return NO; // We do not want UITextField to insert line-breaks.
  }
  </code></pre>