我试图在ViewController的标题导航栏上显示从TableView单元格的UI按钮中选择的项目数。但是它工作正常，您必须退出屏幕并返回以查看选择的项目数。我如何解决这个问题https://gifyu.com/image/Sh5gs

class DealerCardTableViewCell: UITableViewCell {
        @IBOutlet weak var selectDealerButton: UIButton!
    
      var dealerCount = 0{
            didSet{
                dealerListDelegate?.didUpdateDealerCount(dealerCount: dealerCount)
            }
        }
    
       @objc func selectDealer() {
            guard let account = account else { return }
            
            selectDealerButton.isSelected = !selectDealerButton.isSelected
            dealerCount+=selectDealerButton.isSelected ? 1 : -1
        }
    
    
    class DealerListViewController: DealerCardTableViewController {
    
       override func viewWillAppear(_ animated: Bool) {
            super.viewWillAppear(animated)
            didUpdateDealerCount(dealerCount: 0)
        }

    func didUpdateDealerCount(dealerCount: Int){
        navigationItem.title = "Selected Dealers - \(selectedAccounts.count + dealerCount)"
    }

 

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
            guard let cell = super.tableView(tableView, cellForRowAt: indexPath) as? DealerCardTableViewCell, accounts.count > 0 else { return UITableViewCell() }
    
                cell.delegate = self
    
    }