Swift写的简单UITableView

import UIKit

let ScreenWidth = UIScreen.main.bounds.size.width
let ScreenHeight = UIScreen.main.bounds.size.height
let footerInSectionColor = UIColor.init(red: 240/255.0, green: 241/255.0, blue: 244/255.0, alpha: 1)

class ViewController: UIViewController {
    
    private lazy var dataSource: Array = {
        return [[["title": "智能硬件"]],
                [["title": "特色闹铃"],
                 ["title": "定时关闭"]],
                [["title": "账号与安全"]],
                [["title": "推送设置"],
                 ["title": "收听偏好设置"],
                 ["title": "隐私设置"]],
                [["title": "断点续听"],
                 ["title": "2G/3G/4G播放和下载"],
                 ["title": "下载音质"],
                 ["title": "清理占用空间"]],
                [["title": "特色功能"],
                 ["title": "新版本介绍"],
                 ["title": "给喜马拉雅好评"],
                 ["title": "关于"]]]
    }()
    
    // 懒加载TableView
    private lazy var tableView : UITableView = {
        let tableView = UITableView.init(frame:CGRect(x:0, y:0, width:ScreenWidth, height:ScreenHeight), style: UITableView.Style.plain)
        tableView.delegate = self
        tableView.dataSource = self
        tableView.backgroundColor = footerInSectionColor
        tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
        return tableView
    }()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.navigationItem.title = "设置"
        self.view.addSubview(self.tableView)
    }
}

extension ViewController : UITableViewDelegate, UITableViewDataSource {
    func numberOfSections(in tableView: UITableView) -> Int {
        return dataSource.count
    }
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return dataSource[section].count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
        cell.selectionStyle = .none
        let sectionArray = dataSource[indexPath.section]
        let dict: [String: String] = sectionArray[indexPath.row]
        cell.textLabel?.text = dict["title"]
        if indexPath.section == 3 && indexPath.row == 1 {
            let cellSwitch = UISwitch.init()
            cell.accessoryView = cellSwitch
        }else {
            cell.accessoryType = .disclosureIndicator
        }
        return cell
    }
    
    func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
        return 10
    }
    
    func tableView(_ tableView: UITableView, viewForFooterInSection section: Int) -> UIView? {
        let footerView = UIView()
        footerView.backgroundColor = footerInSectionColor
        return footerView
    }
}