title: Adding outlets to UIButton
body: <p>For quickly mocking up UI, I'd like to be able to drag buttons onto a view in interface builder, then drag a connection from that button to the view that should appear when you click it.</p>
  
  <p>A subclass of UIButton is a little inconvenient to use in IB, so I'd prefer to add the behavior to UIButton itself. Unfortunately, it seems like outlets created in a category aren't visible in IB:</p>
  
  <pre><code>@interface UIButton (myextensions) {
      IBOutlet UIView *outletDestination;
  }
  @end
  </code></pre>
  
  <p>Can extra outlets be added this way?</p>