The documentation of UIViewControllerTransitionCoordinator isn't very detailed. It implies that you may want to implement this protocol in rare circumstances, but UIViewControllerTransitionCoordinator implements UIViewControllerTransitionCoordinatorContext, which means that you have to implement over a dozen(!) methods to conform to the protocol. I've seen some other people using it by accessing the transitionCoordinator property of a UIViewController while it is being presented, usually in viewWillAppear. However, the documentation implies that viewWillAppear is not the right place to implement either. How are you supposed to make use of this protocol and synchronize animations with those of a presenting view?
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GoldenJoe
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