title: Rotation methods deprecated, equivalent of 'didRotateFromInterfaceOrientation'?
body: <p>I'm trying to implement the new <code>viewWillTransitionToSize</code> method which has been introduced in iOS 8 (all other rotation methods have been deprecated). I'd like to know what the equivalent of <code>didRotateFromInterfaceOrientation</code> is now as there are a number of clean up tasks we need to perform and I can't see a block that we can assign to <code>UIViewControllerTransitionCoordinator</code> in order to be called when 'transition' to a new size finishes. Thanks.</p>