title: iOS KVO superclass
body: <p>I'm trying through KVO reach a superclass and then a object which has a property. It looks likes this</p>
  
  <pre><code>SuperCell(UITableViewCell) - Person * - name(NSString*)
  
  /\
  
  Cell(SuperCell)
  </code></pre>
  
  <p>It keeps crashing when I do this:</p>
  
  <pre><code>[cell valueForKey:@"person.name"];
  </code></pre>
  
  <p>But when I do this it works:</p>
  
  <pre><code>[[cell valueForKey:@"person"] valueForKey:@"name"];
  </code></pre>
  
  <p>Is it possible to do the first style? Or do I need to split it myself?</p>