UITableViewCellで自作enumを使う

UITableView+Row.swift

extension UITableView {
	func dequeueReusableCell<ROW: Identifiable>(with row: ROW, for indexPath: IndexPath) -> UITableViewCell where ROW.ID == String {
		return self.dequeueReusableCell(withIdentifier: row.id, for: indexPath)
	}
}

Usage-Presenter.swift

class APresenter {
	enum Row: Identifiable {
		case title(String)
		case body(String)
		case icon(UIImage)
		
		enum Identifier: String {
			case MyTextCell
			case MyImageCell
		}
		
		typealias ID = String
		
		var id: Self.ID {
			switch self {
				case .title, .body:
					return Identifier.MyTextCell.rawValue
				case .icon:
					return Identifier.MyImageCell.rawValue
			}
		}
	}
	
	func row(cellForRowAt indexPath: IndexPath) -> Row {
		switch indexPath.row {
			case 1:
				return .body("本文")
			case 2:
				return .icon(UIImage(imageLiteralResourceName: "myIcon.jpg"))
			default:
				return .title("タイトル")
		}
	}
}

Usage-ViewController.swift

class AViewController: UIViewController, UITableViewDataSource {
	lazy var presenter = APresenter()
	
	func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
		return 3
	}
	
	func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
		let row = presenter.row(cellForRowAt: indexPath)
		let cell = tableView.dequeueReusableCell(with: row, for: indexPath)
		switch row {
			case .title(let title):
				cell.textLabel?.text = title
			case .body(let body):
				cell.textLabel?.text = body
			case .icon(let icon):
				cell.imageView?.image = icon
		}
		return cell
	}
}