Playgroundで動作するミニマムなUITableViewControllerのサンプルコード

import UIKit
import PlaygroundSupport


class MyTableViewController: UITableViewController {
    private lazy var items: [String] = {
        return [
            "The Swift Programming Language",
            "The Swift Programming Language",
            "The Swift Programming Language"
        ]
    }()

    override func viewDidLoad() {
        super.viewDidLoad()
        // セルの区切り線を消すハック
        self.tableView.tableFooterView = UIView()
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        let cell = UITableViewCell(style: .subtitle, reuseIdentifier: nil)
        cell.detailTextLabel?.text = "ここはsubtitle : 1行目テキスト\n2行目テキスト"
        cell.detailTextLabel?.numberOfLines = 2
        cell.detailTextLabel?.lineBreakMode = .byWordWrapping

        let item = items[indexPath.row]
        cell.textLabel?.text = item
        cell.textLabel?.lineBreakMode = .byWordWrapping
        cell.textLabel?.numberOfLines = 0

        return cell
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.items.count
    }
}

PlaygroundPage.current.liveView = MyTableViewController()