class MainViewController: UIViewController {
    public var seletedIndex: Int = 0
    lazy var tableView: UITableView = {
        let table = UITableView()
        table.register(UITableViewCell.self, forCellReuseIdentifier: "Cell")
        return table
    }()
    private var btn: UIButton = {
        let btn = UIButton()
        btn.setTitle("", for: .normal)
        btn.setTitleColor(UIColor.black, for: .normal)
        return btn
    }()
    public var items = [PayMenmet(name: "", icon: "alipay"),PayMenmet(name: "", icon: "wechatpay")]
    lazy var mainView: MainView = MainView()
    private let disposeBag = DisposeBag()
    lazy var service: MainService = MainService.instance
    override func viewDidLoad() {
        super.viewDidLoad()
        initView()
        initBindData()
    }
    func initView() {
        self.view.addSubview(tableView)
        self.view.addSubview(btn)
        tableView.snp.makeConstraints { make in
            make.center.equalToSuperview()
            make.left.right.equalToSuperview()
            make.height.equalTo(120)
        }
        btn.snp.makeConstraints { make in
            make.top.equalTo(tableView.snp.bottom).offset(10)
            make.left.right.equalToSuperview().offset(20)
        }
    }
    func initBindData() {
        tableView.delegate = self
        tableView.dataSource = self
        tableView.selectRow(at: IndexPath(row: seletedIndex, section: 0), animated: true, scrollPosition: .none)
        btn.rx.tap.subscribe(onNext: { [weak self] in

        })
    }
}
extension MainViewController: UITableViewDelegate, UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return items.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as UITableViewCell
        cell.textLabel?.text = items[indexPath.row].name
        cell.imageView?.image = UIImage(named: items[indexPath.row].icon)
        return cell
    }
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        print("indexPath::",indexPath)
        let cell = self.tableView.cellForRow(at: indexPath)
        cell?.accessoryType = .checkmark
    }
    func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
        let cell = self.tableView.cellForRow(at: indexPath)
        cell?.accessoryType = .none
    }
}

the result is that although the first row is selected, the didSelectRowAt is not executed, so the accessoryType does not take effect. What is the reason for this?