如何在swift 3中暂时保存索引路径？

Question

在过滤器选择视图控制器中，我将选择品牌，然后当我按下应用它将弹出到另一个屏幕，如果用户再次回到同一页面，之前选择的应该有复选标记，并且应该暂时保存，直到用户从过滤页面离开到列表页面

func downloadJsonWithURL() {
        let url = URL(string: urlString)!
        let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
            if error != nil { print(error!); return }
            do {
                if let jsonObj = try JSONSerialization.jsonObject(with: data!) as? [[String:Any]] {
                    self.products = jsonObj.map{ Product(dict: $0) }
                    DispatchQueue.main.async {
                        self.tableDetails.reloadData()
                    }
                }
            } catch {
                print(error)
            }
        }
        task.resume()
    }

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "filterSelectionCell", for: indexPath) as! FilterSelectionCell
        activityIndicator.stopAnimating()
        activityIndicator.hidesWhenStopped = true
        tableDetails.isHidden = false
        let product = products[indexPath.row]
        cell.brandProductName.text = product.name
        cell.accessoryType = product.selected ? .checkmark : .none
        if namesArray.count != 0 {
            for name in namesArray{
                if product.name.contains(name){
                        print(product.name)
                    cell.accessoryType = .checkmark
                    }
                    else {
                        cell.accessoryType = .none
                    }
                }
                }
        return cell
    }
 func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
      let selected = products[indexPath.row].selected
      products[indexPath.row].selected = !selected
      tableView.reloadRows(at: [indexPath], with: .none)
      let selectedItems = products.filter{ $0.selected }
      let selectedNames = products.filter{ $0.selected }.map{ $0.name }
      let cell = tableView.cellForRow(at: indexPath)
      selectedIndexPathArray.append(indexPath as NSIndexPath)

    }
struct Product {
    let name : String
    let value : String
    let img : String
    let id : Int

    var selected = false

    init(dict : [String:Any]) {
        self.name = dict["name"] as? String ?? ""
        self.value = dict["value"] as? String ?? ""
        self.img = dict["img"] as? String ?? ""
        self.id = dict["id"] as? Int ?? 0
    }
}