Make UIKitAnimations' frameworks property public via SPI

[acosmicflamingo]

This seems like a simple way to get access to a UIKit animation's options property, which I can then use to do something like this:

observe { transaction
  guard case let .uiKit(animation) = transaction.uiKit.animation.framework
  else { return }
  if animation.options.contains(.transitionCrossDissolve) {
    UIView.transition(with: collectionView, duration: 0.2) {
      dataSource.apply(snapshot, animatedDifferences: true)
    }
  }
}

[stephencelis]

@acosmicflamingo Thanks for exploring and taking the time to PR! The current purpose of uiKit.animation is to automatically wrap observe in a UIView.animate, and so I'm not sure exposing these details for the purpose of more fine-grained animations is how we'd want to approach a solution to the problem.

As an alternative, have you considered adding a custom transaction key to UITransaction? You could, for example, add a shouldAnimateCollectionDifferences boolean and inspect that to decide whether or not you want to animate things:

observe { transaction
  if transaction.shouldAnimateCollectionDifferences {
    UIView.transition(with: collectionView, duration: 0.2) {
      dataSource.apply(snapshot, animatedDifferences: transaction)
    }
  } else {
    // ...
  }
}

[acosmicflamingo]

@stephencelis I didn't know that was possible! And of course, it's already documented LOL

It's exactly what I need. Works like a charm! Thanks :)