UICollectionView how to deselect all

Question

I have a FollowVC and FollowCell Setup with collection View. I can display all the datas correctly into my uIcollection view cell using the following code with no problem.

Answer 1

Using Extension in Swift 4

extension UICollectionView {

    func deselectAllItems(animated: Bool) {
        guard let selectedItems = indexPathsForSelectedItems else { return }
        for indexPath in selectedItems { deselectItem(at: indexPath, animated: animated) }
    }
}