UIViewControllerTransitioningDelegate on tvOS not being called

Question

So I'm trying to do an animated transition between viewcontrollers on tvOS 10.

The UIViewControllerTransitioningDelegate protocol is available on tvOS so I assumed I could animate it as well. But for some reason none of the functions are ever called when presenting the new viewcontroller.

I have no idea what I'm doing wrong since I'm doing basically the exact same on iOS.

Here is the code I'm using:

---

Presenting code

func showStuff() {
    let viewController = ResultViewController()
    viewController.transitioningDelegate = ResultViewControllerTransitionManager()
    viewController.modalPresentationStyle = .custom
    navigationController?.present(viewController, animated: true, completion: nil)
}

---

Transition Delegate

class ResultViewControllerTransitionManager: NSObject, UIViewControllerAnimatedTransitioning, UIViewControllerTransitioningDelegate {
    var duration = 0.5
    var isPresenting = false

    func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
        return duration
    }

    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
        guard let fromView = transitionContext.view(forKey: UITransitionContextViewKey.from) else {return}
        guard let toView = transitionContext.view(forKey: UITransitionContextViewKey.to) else {return}

        (...)
    }

    func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        isPresenting = false
        return self
    }

    func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        isPresenting = true
        return self
    }
}

Answer 1

So apparently initialising the animationmanager in the showStuff() function was the problem. Storing it as a property in the Main viewcontroller and passing it along did work.