For some reason my scrollbar always appears underneath the collection view section header. Any help is greatly appreciated!
Here is my alternative which seems to work better on iOS12 when subclassing UICollectionReusableView.
final class BasicCollectionSectionHeader: UICollectionReusableView {
override var layer: CALayer {
let layer = super.layer
layer.zPosition = 0 // make the header appear below the collection view scroll bar
return layer
}
}