title: Disabled UIButton not faded or grey
body: <p>In my iPhone app, I have a UIButton which I have created in Interface Builder. I can successfully enable and disable it like this in my code ...</p>
  
  <pre><code>sendButton.enabled = YES;
  </code></pre>
  
  <p>or</p>
  
  <pre><code>sendButton.enabled = NO;
  </code></pre>
  
  <p>However, the visual look of the button is always the same! It is not faded or grey. If I attempt to click it though, it is enabled or disabled as expected. Am I missing something? Shouldn't it look faded or grey?</p>