Re: UINavigationController back gesture animation
Re: UINavigationController back gesture animation
- Subject: Re: UINavigationController back gesture animation
- From: Milton Moura <email@hidden>
- Date: Wed, 15 Jun 2016 15:32:53 +0000
You are trying to access it before any animation / transition takes place.
From the docs:
"The transition coordinator object associated with a currently active transition or nil if no transition is in progress.” (https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIViewController_Class/#//apple_ref/occ/instm/UIViewController/transitionCoordinator <https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIViewController_Class/#//apple_ref/occ/instm/UIViewController/transitionCoordinator>)
You should get a valid reference to the transitionCoordinator in the viewWillAppear or viewWillDisappear, depending on where you need it.
Also, look here for an example usage:
https://www.raizlabs.com/dev/2016/05/smarter-animated-row-deselection-ios/ <https://www.raizlabs.com/dev/2016/05/smarter-animated-row-deselection-ios/>
> On 15 Jun 2016, at 14:57, Torsten Curdt <email@hidden> 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?
> _______________________________________________
>
> Cocoa-dev mailing list (email@hidden)
>
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>
> Help/Unsubscribe/Update your Subscription:
>
> This email sent to email@hidden
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden