collectionView as? CustomCollectionView == nil ????

[tanjt223]

hello everyone, why i print placeholderCollectionView is nil ? i use code to create the collectionview like:

class CustomCollectionView: CollectionView {
    override func customSetup() {
        placeholdersProvider = .custom
    }
}
class vc: UICollectionViewController {
   var placeholderCollectionView: CustomCollectionView? {
        return collectionView as? CustomCollectionView
    }
}

[shls77cxl]

met the same problem！