title: iOS: Using UIAppearance to define custom UITableViewCell color
body: <p>If I set the backgroundColor attribute on a grouped UITableViewCell, the background color successfully changes. Great.</p>
  
  <p>But I'd like to use UIAppearance to change the background color on all my UITableViewCells, so I can do it in one place and affect a change everywhere. Here's my code:</p>
  
  <pre><code>[[UITableViewCell appearance] setBackgroundColor:[UIColor colorWithRed:30.0/255.0 green:30.0/255.0 blue:30.0/255.0 alpha:1.0]];
  </code></pre>
  
  <p>UITableViewCell implements UIAppearance and UIAppearanceContainer, so I would have thought this would work. But it doesn't. I've also tried using <code>-[UITableViewCell appearanceWhenContainedIn:(Class)]</code>, and that doesn't work either.</p>
  
  <p>Any ideas?</p>