title: How does Xcode load the main storyboard?
body: <p>When I create a new single view application in Xcode 4.6 using storyboard, we can see that the main function creates a new application using the application delegate like this:</p>
  
  <pre><code>return UIApplicationMain(argc, argv, nil, NSStringFromClass([MyAppDelegate class]));
  </code></pre>
  
  <p>However if we look at MyAppDelegate.h and MyAppDelegate.m, there is nowhere in the code that references MainStoryboard.storyboard. This differs from a non-storyboard version where we can find the line of code that loads the nib file programmatically.</p>
  
  <p>So my question is, how does the storyboard get loaded? (where should I poke to find it?)</p>