GenericType TableView, Copy and paste into your playground files

CLSTableView.swift

//: A UIKit based Playground for presenting user interface
  
import UIKit
import PlaygroundSupport

/// CLSTableViewConfig for extend, add more tableview properties.
struct CLSTableViewConfig {
    var heightForRow: CGFloat?
}

/// CLSTableView for single cell type only
final class CLSTableView<T, Cell: UITableViewCell>: UITableView, UITableViewDelegate, UITableViewDataSource {
    
    var contents: [T] = [] {
        didSet {
            DispatchQueue.main.async {
                self.reloadData()
            }
        }
    }
    
    var configure: (Cell, T) -> Void
    
    var selectHandler: (T) -> Void
    
    private let identifier = "identifier"
        
    private var config: CLSTableViewConfig
    
    /// It should be
    init(contents: [T],
         config: CLSTableViewConfig = CLSTableViewConfig(),
         configure: @escaping (Cell, T) -> Void,
         selectHandler: @escaping (T) -> Void) {
        self.config = config
        self.contents = contents
        self.configure = configure
        self.selectHandler = selectHandler
        super.init(frame: .zero, style: .plain)
        self.setup()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    private func setup() {
        register(Cell.self, forCellReuseIdentifier: identifier)
        
        /// It means automaticDimension
        if let h = config.heightForRow {
            rowHeight = h
        } else {
            estimatedRowHeight = 44.0
            rowHeight = UITableView.automaticDimension
        }
        
        super.delegate = self
        super.dataSource = self
        tableFooterView = UIView()
        backgroundColor = .clear
        separatorStyle = .none
    }
    
    /// Can't make an extensions of generic class in Swift4 for now
    /// cf. https://stackoverflow.com/questions/48386613/make-an-extensions-of-generic-class-in-swift4
    
    // ******************************************
    //
    // MARK: - UITableViewDelegate
    //
    // ******************************************
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        tableView.deselectRow(at: indexPath, animated: true)
        let content = contents[indexPath.row]
        selectHandler(content)
    }
    
    // ******************************************
    //
    // MARK: - UITableViewDataSource
    //
    // ******************************************
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return contents.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: identifier, for: indexPath) as! Cell
        let content = contents[indexPath.row]
        configure(cell, content)
        return cell
    }
}

final class MyViewController: UIViewController {
    
    private let contents =
        Array(repeating: "FFFFFFFF", count: 2) +
            Array(repeating: "GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG", count: 2)
    
    /// CLSTableView
    private lazy var tableView: CLSTableView<String, UITableViewCell> = {
        return CLSTableView(contents: contents, configure: { (cell: UITableViewCell, item) in
            cell.textLabel?.numberOfLines = 0
            cell.textLabel?.text = item
        }, selectHandler: { (item) in
            print("\(item) had been selected")
        })
    }()
    
    override func loadView() {
        self.view = tableView
    }
}

let window = UIWindow(frame: CGRect(x: 0, y: 0, width: 768, height: 1024))
window.rootViewController = MyViewController()
window.makeKeyAndVisible()
PlaygroundPage.current.liveView = window