UICollectionView: Guia Completo para iOS

// Configuração básica do UICollectionView

import UIKit
class CollectionViewController: UIViewController {
   @IBOutlet weak var collectionView: UICollectionView!

   override func viewDidLoad() {
       super.viewDidLoad()
       collectionView.dataSource = self
       collectionView.delegate = self
       configureFlowLayout()
   }

   private func configureFlowLayout() {
       let flowLayout = collectionView?.collectionViewLayout as! UICollectionViewFlowLayout
       flowLayout.minimumInteritemSpacing = 10
       flowLayout.sectionInset = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)
   }
}
extension CollectionViewController: UICollectionViewDelegateFlowLayout {
}
extension CollectionViewController: UITableViewDataSource {
   func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
       return 50
   }

   func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
       // Note que aqui usamos UICollectionView
       let cell = collectionView.dequeueReusableCell(withClass: MyCollectionViewCell.self)
       return cell
   }
}