Vertical scrolling in a master view that contains UICollectionView and UIImageView

Question

I currently have a view set up in Storyboard comprised of an UIImageView on top and a UICollectionView . The UIImageView has a fixed height, while the UICollectionView has a variable height depending on the number of cells associated with it.

What I am trying to figure out is how to set up the scrolling so that the entire master view could scroll vertically, meaning that the UIImageView would not stay locked on the top, and that when I scroll past a certain height in the UICollectionView it could then perform some action such as downloading more items to placed into additional cells?

Thanks!

Answer 1

I think your focus is on header view of collection view.

Refer to this for complete understanding: