title: How to make controls fade away on iPad/iPhone as per interface guidelines
body: <p>THe HIG makes a statement that on the iPad, to consider fading away controls similar to how the built in photo app does it.
  How is this accomplished?
  In my case I have an image occupying the majority of the screen with a tab bar and potentially tool bar and potentially other controls. How do I fade everything away except the image. And bring it back if the user touches the screen.</p>
  
  <p>Thanks</p>