title: How does Xcode decide which xib to load first? How can I change that?
body: <p>I have downloaded an Xcode project that has three xibs (A.xib, B.xib, and C.xib). I noticed that:</p>
  
  <ul>
  <li>None of them is called "MainWindow.xib".</li>
  <li>In the project summary the <strong>Main Interface</strong> value is set to <strong>MainWindow</strong></li>
  <li><strong>Main nib file base name</strong> is not set</li>
  <li><strong>Main.c</strong> does not specify the app delegate either <code>int retVal = UIApplicationMain(argc, argv, nil, nil);</code></li>
  </ul>
  
  <p>Still, when I build&amp;run, the app loads A.xib.
  How does the app decide what to load?</p>
  
  <p>I am using Xcode 4 and I am targeting iOS 5.
  Thank you.</p>