title: What are all the animation duration constants in UIKit?
body: <p>What are all the public animation duration <strong>constants</strong> (or readonly properties) defined in UIKit as of iOS 7?</p>
  
  <p>E.g.:</p>
  
  <p>In <em>UINavigationController.h</em>:</p>
  
  <pre><code>UIKIT_EXTERN const CGFloat UINavigationControllerHideShowBarDuration;
  </code></pre>
  
  <p>In <em>UIApplication.h</em>:</p>
  
  <pre><code>@property(nonatomic,readonly) NSTimeInterval statusBarOrientationAnimationDuration;
  </code></pre>
  
  <p>(to clarify, I'm not asking about their values)</p>