iOS Android Material Design Hierarchical Timing using UICollectionView

Question

I want to do the animation introduced by Android Material Design Hierarchical Timing in iOS using UICollectionView

Lets say its a collectionView, and resizing the view i

Answer 1

Something like this should work. Random pieces thrown together, I know.

Here's a very well done pen of what you're describing. In it you'll find that the timing function in question is the curve, defined in CSS as:

cubic-bezier(0.650, 0.045, 0.405, 1.000)

Knowing the timing function, you can implement this animation in iOS. Here's a link to another question -- it shows how to pull off custom animations and is very well explained.

Custom timing functions in iOS

May take some simple math, but this should help! ...i hope.

cheers