UIPercentDrivenInteractiveTransition doesn't get to animation's completion on fast gesture

Question

I have created an interactive transition. My func animateTransition(transitionContext: UIViewControllerContextTransitioning) is quite normal, I get the container

Answer 1

I had a similar problem, but with programmatic animation triggers not triggering the animation completion block. My solution was like Sam's, except instead of dispatching after a small delay, manually call finish on the UIPercentDrivenInteractiveTransition instance.

class SwipeInteractor: UIPercentDrivenInteractiveTransition {
  var interactionInProgress = false
  ...
}

class AnimationController: UIViewControllerAnimatedTransitioning {
  private var swipeInteractor: SwipeInteractor
  ..
  func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
    ...
    if !swipeInteractor.interactionInProgress {
      swipeInteractor.finish()
    }
    ...
    UIView.animateWithDuration(...)
  }
}