TextCollectionView-Demo_2.swift

class ViewController: UIViewController {
    
    var viewModel: [String] = []
    
    lazy var collectionView: UICollectionView = {
        let layout = UICollectionViewFlowLayout()
        layout.estimatedItemSize = CGSize(width: 1, height: 1)
        let view = UICollectionView(frame: .zero, collectionViewLayout: layout)
        view.translatesAutoresizingMaskIntoConstraints = false
        view.register(LabelCollectionViewCell.self, forCellWithReuseIdentifier: "Cell")
        view.dataSource = self
        view.backgroundColor = .clear
        return view
    }()
    private lazy var collectionViewConstraints: [NSLayoutConstraint] = [
        collectionView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),
        collectionView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
        collectionView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor),
        collectionView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor),
    ]
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        setupLayoutConstraints()
    }
    private func setupLayoutConstraints() {
        view.addSubview(collectionView)
        NSLayoutConstraint.activate(collectionViewConstraints)
    }
}
 
extension ViewController: UICollectionViewDataSource {
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return viewModel.count
    }
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! LabelCollectionViewCell
        cell.label.text = viewModel[indexPath.item]
        return cell
    }
}