Collection View Transition

Last Revision:	Version 1.1, 2013-10-29 First public release.
Build Requirements:	Xcode 5.0 or later; iOS SDK 7.0 or later.
Runtime Requirements:	iOS 7.0 or later.

This sample illustrates how to create a custom transition when navigating between two collection views in a navigation hierarchy managed by a navigation controller. The transition can be interrupted and reversed. It uses a subclass of UICollectionViewTransitionLayout to help in the transition of the cell positions based on gesture position.

The application has two view collection view controllers that display images. The first is a stack view, the second is a grid view. You can transition from the stack to the grid by tapping on the stack. You can also use a pinch gesture, in which case you can control the speed of, and even reverse, the transition.

This sample was part of the WWDC 2013 session 218: "Custom Transitions Using View Controllers".