title: Loading screen for iOS app
body: <p>I need a loading screen to show while some data is being downloaded from the server. I present a view controller with modal segue without animation. But I don't know how to dismiss the loading screen view controller since <code>dismissViewController</code> function can only be called from inside.</p>
  
  <p>I should be able to dismiss the loading screen view controller from another view controller. Any suggestions?</p>