title: How do I know which xib is the first one to load?
body: <p>I am researching a huge Xcode project, how do I know which xib is the first xib be loaded by IOS?</p>
  
  <p>In main.m, I can only know the main delegation file, but how to find the main.xib.</p>
  
  <p>BTW, I search the {project}-info.plist, but found nothing.</p>
  
  <p>Addtion, I know which file is the rootviewcontroller. </p>