CollectionView doesn't show any CollectionViewCell-CodePudding

I've created a generic UIView class which contains a UICollectionView inside of it. Just as below. (Class Below also handles the protocols of UICollectionView with Default values)

class MyCollectionView: BaseView<CollectionViewModel> {

private lazy var myCollectionView: UICollectionView = {
    let temp = UICollectionView(frame: .zero, collectionViewLayout: UICollectionViewLayout()) // setting initial collectionView
    temp.translatesAutoresizingMaskIntoConstraints = false
    temp.delegate = self
    temp.dataSource = self
    temp.register(CollectionViewCell.self, forCellWithReuseIdentifier: CollectionViewCell.identifier)
    temp.clipsToBounds = true
    
    return temp
 }() 
}

I've created an instance of MyCollectionView(class above), and added as subview to the MainViewController(Class Below). So doing that made me show a MyCollectionView as a subview of MainViewController. I've accomplished so far.

class MainViewController: UIViewController {

private lazy var collectionView: MyCollectionView = {
    let temp = MyCollectionView()
    temp.translatesAutoresizingMaskIntoConstraints = false
    temp.backgroundColor = .black
    
    
    return temp
}()

override func viewDidLoad() {
    super.viewDidLoad()
    view.addSubview(collectionView)
    setUpConstraintsAndViews()
    // Do any additional setup after loading the view.
}

Later on I tried to make UICollectionViewCell class and register that to myCollectionView. But still I can not see any cells on my screen. What might I could be missing?

CodePudding user response：

Your MyCollectionView class is not a UICollectionView. It does not have a subview of a UICollectionView it has a private variable myCollectionView that creates a collection view.

As far as I can tell you're adding an instance of MyCollectionView as a subview of your MainViewController. I don't see how that adds a UICollectionView to your view MainViewController.

How is the consumer of your MyCollectionView supposed to get to the collection view that it owns?