title: Detect rotation changes in iOS
body: <p>I am making an iOS app that needs to do a little interface rearrangement upon rotation. I am trying to detect this by implementing <code>- (void)orientationChanged:(NSNotification *)note</code>, but this gives me notifications for when the device is face up or face down.</p>
  
  <p>I want a way to just get notified when the interface changes orientations.</p>