Add multiple checkmark to cell in different sections and save their state in swift ios

Question

In my app i have 5 sections with some data in it. what i want is to checkmark lets say 2 cell in section 1, then 3 cell in section 2 and so on at a time. The multiple selection in different sections in working and whatever cell is being checkmarked in that cell i have a label title which i am adding and storing in userdefaults because that title i need to show in previous screen. Now when i selected 2 cells from section 1, 2 cell from section 2 and go back then only latest selection cell title is showing in previous screen which is wrong it should show 4 titles with comma seperated which code i have written in previous screen. Dont know what to do

My code:-

 func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
    {
        let cell = tableView.dequeueReusableCell(withIdentifier: "allAssetCell", for: indexPath) as! AllAssetCell

        var mainArr = [SymName]()

        if indexPath.section == digitalIndex
        {
            mainArr = isSearch ? filtereddigitalArr : digitalArr
        }
        else if indexPath.section == forexIndex
        {
            mainArr = isSearch ? filteredforexArr : forexArr
        }
        else if indexPath.section == stocksIndex
        {
            mainArr = isSearch ? filteredstocksArr : stocksArr
        }
        else if indexPath.section == cryptoIndex
        {
            mainArr = isSearch ? filteredcryptoArr : cryptoArr
        }
        else if indexPath.section == commoditiesIndex
        {
            mainArr = isSearch ? filteredcommoditiesArr : commoditiesArr
        }
        else if indexPath.section == etfIndex
        {
            mainArr = isSearch ? filteredetfArr : etfArr
        }
        else
        {
            mainArr = isSearch ? (filtereddigitalArr + filteredforexArr + filteredstocksArr + filteredcryptoArr + filteredcommoditiesArr + filteredetfArr) : (digitalArr + forexArr + stocksArr + cryptoArr + commoditiesArr + etfArr)
        }

        cell.lblSymbolsName.text = mainArr[indexPath.row].name
        cell.accessoryType = mainArr[indexPath.row].isSelected ? .checkmark : .none
        return cell
    }


func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
    {
        tableView.deselectRow(at: indexPath, animated: true)

        var mainArr = [SymName]()
        var filteredMainArr = [SymName]()

        if indexPath.section == digitalIndex
        {
            if isSearch
            {
                filtereddigitalArr[indexPath.row].isSelected.toggle()
                let selectedNames = filtereddigitalArr.filter{$0.isSelected}.map{$0.name}
                UserDefaults.standard.set(selectedNames, forKey: "selectedNames")

                if selectedNames.count > 0
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: selectedNames)
                }
                else
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: ["All Assets"])
                }
            }
            else
            {
                digitalArr[indexPath.row].isSelected.toggle()
                let selectedNames = digitalArr.filter{$0.isSelected}.map{$0.name}
                UserDefaults.standard.set(selectedNames, forKey: "selectedNames")

                if selectedNames.count > 0
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: selectedNames)
                }
                else
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: ["All Assets"])
                }
            }
        }
        else if indexPath.section == forexIndex
        {
            if isSearch
            {
                filteredforexArr[indexPath.row].isSelected.toggle()
                let selectedNames = filteredforexArr.filter{$0.isSelected}.map{$0.name}
                UserDefaults.standard.set(selectedNames, forKey: "selectedNames")

                if selectedNames.count > 0
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: selectedNames)
                }
                else
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: ["All Assets"])
                }
            }
            else
            {
                forexArr[indexPath.row].isSelected.toggle()
                let selectedNames = forexArr.filter{$0.isSelected}.map{$0.name}
                UserDefaults.standard.set(selectedNames, forKey: "selectedNames")

                if selectedNames.count > 0
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: selectedNames)
                }
                else
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: ["All Assets"])
                }
            }
        }
        else if indexPath.section == stocksIndex
        {
            if isSearch
            {
                filteredstocksArr[indexPath.row].isSelected.toggle()
                let selectedNames = filteredstocksArr.filter{$0.isSelected}.map{$0.name}
                UserDefaults.standard.set(selectedNames, forKey: "selectedNames")

                if selectedNames.count > 0
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: selectedNames)
                }
                else
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: ["All Assets"])
                }
            }
            else
            {
                stocksArr[indexPath.row].isSelected.toggle()
                let selectedNames = stocksArr.filter{$0.isSelected}.map{$0.name}
                UserDefaults.standard.set(selectedNames, forKey: "selectedNames")

                if selectedNames.count > 0
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: selectedNames)
                }
                else
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: ["All Assets"])
                }
            }
        }
        else if indexPath.section == cryptoIndex
        {
            if isSearch
            {
                filteredcryptoArr[indexPath.row].isSelected.toggle()
                let selectedNames = filteredcryptoArr.filter{$0.isSelected}.map{$0.name}
                UserDefaults.standard.set(selectedNames, forKey: "selectedNames")

                if selectedNames.count > 0
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: selectedNames)
                }
                else
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: ["All Assets"])
                }
            }
            else
            {
                cryptoArr[indexPath.row].isSelected.toggle()
                let selectedNames = cryptoArr.filter{$0.isSelected}.map{$0.name}
                UserDefaults.standard.set(selectedNames, forKey: "selectedNames")

                if selectedNames.count > 0
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: selectedNames)
                }
                else
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: ["All Assets"])
                }
            }
        }
        else if indexPath.section == commoditiesIndex
        {
            if isSearch
            {
                filteredcommoditiesArr[indexPath.row].isSelected.toggle()
                let selectedNames = filteredcommoditiesArr.filter{$0.isSelected}.map{$0.name}
                UserDefaults.standard.set(selectedNames, forKey: "selectedNames")

                if selectedNames.count > 0
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: selectedNames)
                }
                else
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: ["All Assets"])
                }
            }
            else
            {
                commoditiesArr[indexPath.row].isSelected.toggle()
                let selectedNames = commoditiesArr.filter{$0.isSelected}.map{$0.name}
                UserDefaults.standard.set(selectedNames, forKey: "selectedNames")

                if selectedNames.count > 0
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: selectedNames)
                }
                else
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: ["All Assets"])
                }
            }
        }
        else if indexPath.section == etfIndex
        {
            if isSearch
            {
                filteredetfArr[indexPath.row].isSelected.toggle()
                let selectedNames = filteredetfArr.filter{$0.isSelected}.map{$0.name}
                UserDefaults.standard.set(selectedNames, forKey: "selectedNames")

                if selectedNames.count > 0
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: selectedNames)
                }
                else
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: ["All Assets"])
                }
            }
            else
            {
                etfArr[indexPath.row].isSelected.toggle()
                let selectedNames = etfArr.filter{$0.isSelected}.map{$0.name}
                UserDefaults.standard.set(selectedNames, forKey: "selectedNames")

                if selectedNames.count > 0
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: selectedNames)
                }
                else
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: ["All Assets"])
                }
            }
        }
        else
        {
            mainArr = digitalArr + forexArr + stocksArr + cryptoArr + commoditiesArr + etfArr
            filteredMainArr = filtereddigitalArr + filteredforexArr + filteredstocksArr + filteredcryptoArr + filteredcommoditiesArr + filteredetfArr

            if isSearch
            {
                filteredMainArr[indexPath.row].isSelected.toggle()
                let selectedNames = filteredMainArr.filter{$0.isSelected}.map{$0.name}
                UserDefaults.standard.set(selectedNames, forKey: "selectedNames")

                if selectedNames.count > 0
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: selectedNames)
                }
                else
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: ["All Assets"])
                }
            }
            else
            {
                mainArr[indexPath.row].isSelected.toggle()
                let selectedNames = mainArr.filter{$0.isSelected}.map{$0.name}
                UserDefaults.standard.set(selectedNames, forKey: "selectedNames")

                if selectedNames.count > 0
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: selectedNames)
                }
                else
                {
                    ApiUtillity.sharedInstance.saveAssetTypeTextUserDefaults(arr: ["All Assets"])
                }
            }
        }

        tableView.reloadRows(at: [indexPath], with: .none)
    }

Answer 1

you need to declare these two variables outside of the didSelect method

var mainArr = [SymName]()
var filteredMainArr = [SymName]()

Because when you select a cell, it creates new array and previous is discarded.