UICollectionView with a sticky header

Question

I found a blog on how to make sticky headers and it works great. Only thing is I don\'t think it takes into account the sectionInserts.

This is how its intended to l

Answer 1

This is really a good solution and works perfectly. However, since we have to return YES from shouldINvalidateLayoutForBoundsChange, this basically calls prepareLayout every time the view scrolls. Now, IF your prepareLayout has the responsibility of creating the layout attributes, which is quite common, this will immensely affect the scroll performance.

One solution, which worked for me, is to not create the layout attributes in prepareLayout but instead do it in a separate method which you call explicitly before calling invalidateLayout. UICollectionView calls prepareLayout as and when it feels it needs to know about the layout and hence this solution will take care of those cases also.