Asks your delegate for the interactive animator object to use when presenting a view controller.
- iOS 7.0+
- tvOS 9.0+
The transition animator object returned by your
Controller(for Presented: presenting: source:)
The interactive animator object to use to manage the timing of the transition or
nil if you do not want to support interactive transitions.
Use this method to create and return an object that implements the methods of the
UIView protocol. The implementation of that protocol should configure the event-handling code required to manage the appearance of the target view controller. You may return
nil from this method if you do not want to the animations to be interactive.
For more information on implementing an interactive animator object, see