initialLayoutAttributesForAppearingItemAtIndexPath fired for all visible cells, not just inserted cells

Question

Has anyone seen a decent answer to this problem?

initialLayoutAttributesForAppearingItemAtIndexPath seems to be being called for all visible cells, not just

Answer 1

Make sure you're using new method signature in Swift 3. Autocorrection doesn't work for this method:

func initialLayoutAttributesForAppearingItem(at itemIndexPath: IndexPath) -> UICollectionViewLayoutAttributes?