SampleTableViewController.swift

import UIKit
import PlaygroundSupport

class SampleTableViewController : UITableViewController {
	var selectedIndexPath: IndexPath?

	override func viewDidLoad() {
		super.viewDidLoad()
		self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: "Cell")
	}

	override func numberOfSections(in tableView: UITableView) -> Int {
		return 1
	}
	override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
		return 10
	}

	override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
		let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
		cell.textLabel?.text = "\(indexPath.row)"
		if let selectedIndexPath = selectedIndexPath {
			cell.accessoryType = indexPath == selectedIndexPath ? .checkmark : .none
		}
		return cell
	}

	override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
		self.selectedIndexPath = indexPath
		tableView.deselectRow(at: indexPath, animated: true)
		DispatchQueue.main.asyncAfter(deadline: .now() + 0.25) {
			tableView.reloadData()
		}
	}
}

PlaygroundPage.current.liveView = SampleTableViewController(style: .plain)
PlaygroundPage.current.needsIndefiniteExecution = true