title: How to link a .xib file to a class file with Xcode 4
body: <p>have started a universal project under the new Xcode4. My Application works on both iPhone &amp; iPad devices but not well design for the iPad. I have 2 .xib file for the MainWindow: MainWindow.xib (iPhone device) &amp; MainWindow-Ipad.xib (iPad device). But only one .xib file for my MainView: MainView.xib.</p>
  
  <p>So I'm trying to create a specific .xib file for the iPad Device:</p>
  
  <p>New file > User interface > View  -> next -> device family : iPad -> MainView-iPad.xib -> save</p>
  
  <p>And of course, there is nothing connected,no referencing outlet, no link to any class.</p>
  
  <p>I check each thumbnail of my new MainView-iPad.xib in order to link it to my MainViewController class without success !?</p>
  
  <p>Where or how can  I link it to my MainViewController class?
  Thanks in advance.</p>