title: UIViewController viewDidAppear after dismiss?
body: <p>I have an app that uses a storyboard. I am going from the "main view controller" to the others using standard segues, and I am dismissing the other viewControllers with dismissViewController. (note, they are mostly being displayed in form sheet).</p>
  
  <p>Thing is, when it returns to the main view controller, I need to do some cleanup (clear out arrays, reload a tableview and so on). How would I go about doing this, since i cannot use viewDidLoad or viewDidAppear?</p>