AnimatableCollectionView and AnimatableCollectionViewCell

[gkye]

An AnimatableCollectionView and/or an AnimatableCollectionViewCell would be nice :+1:

[JakeLin]

For basic features, it is straight forward like AnimatableTableView and AnimatableTableViewCell, For more complicated features like slide in all cells one by one, it may require to do something with UICollectionViewDelegateFlowLayout to customise the animation. Any ideas?

[tbaranes]

A few interesting UICollectionView layout animations: AnimatedCollectionViewLayout

[JakeLin]

@tbaranes those are like our transitions.

[tbaranes]

Yeah, but they are collectionView transitions 😆 I don't know well the API, but we may be able to reuse the viewControllers animations for some cases.

[JakeLin]

In our case, we conform to UIViewControllerAnimatedTransitioning and implement func animateTransition(using transitionContext: UIViewControllerContextTransitioning) . In collection trainsitons, we need to subclass UICollectionViewFlowLayout and override layoutAttributesForElements. All animations are based on attributes. We need to abstract how collection view attributes to transition fromVC, toVC. formView and toView. I don't think that's easy to do  😣 The design of UIKit doesn't consider to share animations to different scenarios. Even for transition and presentation animations, they are very similar but hard to share the code for similar effect 😥