解决UITableViewCell的重用机制导致的问题

// 给每个cell打上不同tag标记
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let identifier = String(format: "%ld%ld%@", indexPath.section, indexPath.row, "SelectedBusinessCell")
        var cell = tableView.dequeueReusableCell(withIdentifier: identifier, for: indexPath)
        if cell == nil {
            cell = SelectedBusinessCell.init(style: .default, reuseIdentifier: identifier)
        }
        cell?.backgroundColor = UIColor.white
        cell?.selectionStyle = UITableViewCell.SelectionStyle.none
        
        return cell!
    }

// 取消重用机制
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        
        let identifier = "SelectedBusinessCell"
//        var cell : SelectedBusinessCell? = tableView.dequeueReusableCell(withIdentifier: identifier) as? SelectedBusinessCell
        var cell = tableView.cellForRow(at: indexPath) as? SelectedBusinessCell
        if cell == nil {
            cell = SelectedBusinessCell.init(style: .default, reuseIdentifier: identifier)
        }
        
        cell?.backgroundColor = UIColor.white
        cell?.selectionStyle = UITableViewCell.SelectionStyle.none
        
        return cell!
    }