Another suggestion: support UICollectionViewDelegateFlowLayout

[hyouuu]

Since APLSectionTopToBottomFlowLayout is a subclass of UICollectionViewFlowLayout, it naturally makes sense to support UICollectionViewDelegateFlowLayout so that individual item sizes & line spacings can be customized - for example, currently there is no way to make section height larger than item height.

[hyouuu]

Actually, after further thinking, a headerHeight would suffice for most cases :)

[michaelkamphausen]

I agree, both would be useful.