title: Empty method just to call super
body: <p>Should you add an empty method just to call super?</p>
  
  <p>I've seen this a lot and would like to know, is it just junk code or do I need to leave it?</p>
  
  <p>Example: Should you add this into a custom UIViewController subclass?</p>
  
  <pre><code>- (void)viewDidAppear:(BOOL)animated {
      [super viewDidAppear:animated];
  }
  
  - (void)didReceiveMemoryWarning {
      [super didReceiveMemoryWarning];
  }
  </code></pre>