Most pushes end up deferred (they don’t happen until the run loop turns) so the
transition coordinator would not have been created yet.
Try using the UINavigationController delegate methods,
-navigationController:willShow/didShowViewController:animated:, instead.
> On Jun 15, 2016, at 7:57 AM, Torsten Curdt <tcu...@vafer.org> wrote:
>
> Since I am getting nowhere with this I thought maybe at least I could know
> when the animation finishes.
> So I was trying it like this:
>
> extension UINavigationController {
> func pushViewController(viewController: UIViewController, animated:
> Bool, completion: (Void -> Void)) {
> pushViewController(viewController, animated: animated)
>
> if let coordinator = transitionCoordinator() where animated {
> coordinator.animateAlongsideTransition(nil) { _ in
> completion()
> }
> } else {
> completion()
> }
> }
> }
>
> ...but the coordinator is just nil.
>
> Any thoughts?
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David Duncan
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