title: How to rotate UIViews?
body: <p>The Twitter app is a tab bar app on the iPhone.  Nothing in any of the tabs will rotate, yet, when you click on a link from a tweet, the view controller that is pushed on top of it IS allowed to rotate.  The only rotations I have ever doe is from tilting the device, landscape or portrait, but I don't understand how to use 2d transformations and animations to rotate views.</p>
  
  <p><strong>How do you rotate any view with that's a subclass of UIView?</strong></p>