How to deal with empty items section in UICollectionView CompositionalLayout

Question

I'm trying to make collection view with compositional layout which have multi sections

but if there is empty items in sections how can I deal with it?

if item is empty I don't want to show that section

UICollectionViewCompositionalLayout { (section, env) -> NSCollectionLayoutSection? in
  // do I have to code in this area? 
}

Answer 1

If you are also using UICollectionViewDiffableDataSource, you could deal with empty sections when you are creating/updating your snapshots - append only sections with items in it.

In my project I do something like this:

func performQuery(animate: Bool) {
    var currentSnapshot = NSDiffableDataSourceSnapshot<Section, ViewCell>()
    
    if !calendars.isEmpty {
        currentSnapshot.appendSections([Section(name: "main")])
        currentSnapshot.appendItems(calendars, toSection: Section(name: "main"))
    }

    if !lifeCals.isEmpty {
        currentSnapshot.appendSections([Section(name: "life")])
        currentSnapshot.appendItems(lifeCals, toSection: Section(name: "life"))
    }
    
    dataSource.apply(currentSnapshot, animatingDifferences: animate)
}

This way in case user has 0 life calendars, there will be no "life" section.