Generic collection

Cell.swift

import UIKit

class Cell<C: UIView & CellViewType>: UICollectionViewCell
{
    private let cellView: C
    
    override init(frame: CGRect){
        cellView = C()
        super.init(frame: frame)
        contentView.addSubview(cellView)
        cellView.frame = bounds
    }
    
    @available(*, unavailable)
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

extension Cell: CellType
{
    typealias T = C.T
    
    func configure(object: T) {
        cellView.configure(object: object)
    }
    
    static func identifier()->String {
        return String(describing: type(of: self))
    }
}

CellType.swift

protocol CellType
{
    associatedtype T
    static func identifier()->String
    func configure(object: T)
}

CellViewType.swift

protocol CellViewType
{
    associatedtype T
    func configure(object: T)
}

CollectionDataSource.swift

import UIKit

class CollectionDataSource<C: CellType>: NSObject, UICollectionViewDataSource
{
    var data = [C.T]()
    
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return data.count
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: C.identifier(), for: indexPath)
        if let cell = cell as? C {
            cell.configure(object: data[indexPath.row])
        }
        return cell
    }
}

Task.swift

struct Task {
    let title: String
}

TaskCell.swift

class TaskCell: Cell<TaskCellView> {}

TaskCellView.swift

import UIKit

final class TaskCellView: UIView
{
    private let label = UILabel()
    
    init() {
        super.init(frame: CGRect.zero)
        initialize()
    }
    
    @available(*, unavailable)
    required init?(coder aDecoder: NSCoder) {
        fatalError("unavailable")
    }
    
    private func initialize()
    {
        backgroundColor = UIColor.white
        addSubview(label)
        
        let views: [String: UIView] = ["label" : label]
        views.values.forEach {
            $0.translatesAutoresizingMaskIntoConstraints = false
        }
        
        for constraint in [
            "H:|[label]|",
            "V:|[label]|"
            ] {
                addConstraints(NSLayoutConstraint.constraints(withVisualFormat: constraint, options: [], metrics: nil, views: views))
        }
    }
}

extension TaskCellView: CellViewType
{
    typealias T = Task
    
    func configure(object: T) {
        label.text = "\(object)"
    }
}

ViewController.swift

import UIKit

class ViewController: UIViewController
{
    private lazy var collectionView: UICollectionView = {
        let collectionView = UICollectionView(frame: CGRect.zero, collectionViewLayout: CollectionViewLayout(display: .list))
        collectionView.register(TaskCell.self, forCellWithReuseIdentifier: TaskCell.identifier())
        collectionView.dataSource = datasource
        return collectionView
    }()
    
    private let datasource = CollectionDataSource<TaskCell>()
    
    override func loadView() {
        view = collectionView
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        datasource.data = createData(closedRange: 0...10)
    }
    
    private func createData(closedRange: ClosedRange<Int>) -> [Task] {
        let nf = NumberFormatter()
        nf.numberStyle = .spellOut
        return closedRange.compactMap {
            nf.string(from: NSNumber(integerLiteral: $0))
                .flatMap { Task.init(title: $0.description) }
        }
    }
}