EasyTransitions
A simple way to create custom interactive UIViewController transitions
EasyTransitions is a library that helps developers create custom interactive transitions using simple functions defined in a protocol and avoid handling the multiple transitions APIs in UIKit. During a modal transition, we should only manage the view that is being presented today (modalView). We can inject animations on the root controller anyway. The ModalTransitionAnimator is a really straight forward protocol. Just layout the views ready to be animated on the layout function and perform the animations on animate. You can check the AppStoreAnimator for a basic example.