title: Hierarchical master-detail app with xcode
body: <p>I'm searching any tutorial or explication how to add a "level" in a table-view.</p>
  
  <p>I'm using XCode 4.3.2. I've created a Master-Detail App, and I did all what I should for a working application. But I have only one Level in my table view, and have absolutely no idea how to get a second level.</p>
  
  <p>I searched a lot in Google and in the Apple documentation, but I haven't found anything..</p>
  
  <p>My wish is to have the list, when you click on an object of the list, you go to the second level with a new list, and when you click on an object of the second list, it changes the Detail View.</p>