title: example for passing/sharing data from ListView to EditView controller? (within a UINavigationController layout)
body: <p>Assuming I have a project that is:</p>
  
  <ul>
  <li>using UINavigationController that has the (a) main screen - list of items, and (b) edit screen for an item</li>
  <li>I have UINavigationController instance held in ApplicationDelegate</li>
  <li>Have two separate UI controllers with NIBs for the List Screen and the Edit Screen (i.e. went ADD UIViewController with a XIB file)</li>
  <li>The list of items is stored in the ListScreen UIViewController (e.g. an NSArray of data objects say)</li>
  </ul>
  
  <p>Question - I'm still not clear on how to trigger/implement the handoff from the ListScreen (after a user clicks on a row) to the Edit/DetailsScreen in terms of how to pass/share the data item, i.e. such that in the EditScreen it could update the data, then when the Edit Controller is pop'ed off the UINavigationController stack, the List Screen would be up-to-date.</p>
  
  <p>Can anyone help out with some comments on how to do this &amp;/or a pointer to some sample code that would demonstrate how to do this. </p>