title: How to add a HUD? (iOS)
body: <p>I am trying to have some controls appear when you push a button and have it disappear when you press a different button. Right now the HUD is comprised of an image view, and some custom buttons in a UIView called "credits". I've managed to have it disappear using:</p>
  
  <pre><code>[credits removeFromSuperview];
  </code></pre>
  
  <p>How do I have it reappear?</p>