title: Swift (some) UITableViewDelegate Methods Not Executing
body: <p>I'm in the midst of transitioning some of my code from ObjC to Swift. So far so good, but I'm running into an issue with some of my UITableView's delegate methods not being called. In ObjC, I had my cells animate into the view using the <code>tableView willDisplayCell forRowAtIndexPath</code> method. While the method is suggested to me in Swift, it is never called. The same goes for <code>tableView willDisplayHeaderView forSection</code>, and <code>tableView editActionsForRowAtIndexPath</code>.</p>
  
  <p>I'm fairly sure my class is set properly:</p>
  
  <pre><code>class MyViewController: UIViewController, UITableViewDelegate, UITableViewDataSource
  </code></pre>
  
  <p>and my function declarations were suggested, so no way these are incorrect. </p>
  
  <pre><code>func tableView(tableView: UITableView!, editActionsForRowAtIndexPath indexPath: NSIndexPath!) -&gt; [AnyObject]! {
      ...
  }
  
  func tableView(tableView: UITableView!, willDisplayCell cell: UITableViewCell!, forRowAtIndexPath indexPath: NSIndexPath!) {
      ...
  }
  
  etc.
  </code></pre>
  
  <p>But while the tableView data shows up great, these individual delegate methods never seem to run. Is this a bug, or am I missing something? Thanks!</p>