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README

This is the code repository accompanying the Custom Container View Controller Transitions article, issue #12 of the objc.io publication.

In three steps a custom container view controller is built with support for custom child view controller transition animations:

1. The Basics: implementing ChildViewController with no transition animation (stage-1)

2. Animating the Transition: using an existing animation controller (stage-2, diff)

3. Shrink-Wrapping: implement delegate pattern, external UIViewControllerAnimatedTransitioning vending (stage-3, diff)

Read more on objc.io.