swift-calendar-view-layout-cell.swift

class CalendarCell: UICollectionViewCell {

  @IBOutlet weak var dateLabel: UILabel!

  static let identifier = "calendarCell"

  static func register(with collectionView: UICollectionView) {
    collectionView.register(UINib.init(nibName: "CalendarCell", bundle: nil), forCellWithReuseIdentifier: identifier)
  }

  static func dequeue(from collectionView: UICollectionView, at indexPath: IndexPath, forDay day: Int) -> CalendarCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: identifier, for: indexPath) as? CalendarCell ?? CalendarCell()

    cell.dateLabel.text = String(format: "%02d", day)

    return cell
  }
}