Interruptible animations

[guidedways]

It would be nice to be able to interactively control the animation and set a faction / completion / percentage as we do with UIViewPropertyAnimators.

[rwbutler]

I'll investigate and see what's possible here 👍

[guidedways]

Thanks! This may be a side-wish, but it would be nice to also support interactive animations from within a UIViewControllerAnimatedTransitioning. So for instance, when transitioning between two view controllers, the gradient view could be placed behind child view controllers and have it animate to its new colors interactively.