Refresh Controller doesn't appears after setting backgroundView in CollectionView

Question

i don't understand why it is so, but when backgroundview is not setted, then refreshcontroller works perfect. When for example there isn't any data i set collectionview backgroundview something like called emptyBackgroudnview. it works in tableview great. but in collectionview it doesn't works. i tried to add zPosition using self.refreshControl.layer.zPosition = (self.collectionView.backgroundView?.layer.zPosition)! + 1; but it doesn't helps. I can't swipe down if backgroundview is set.

Answer 1

Found solution. Problem has bin fixed just added collectionView.alwaysBounceVertical = true