store tableview selected data into array with key value

Question

i am new to swift and and i have created tableview select all rows functionality so select deselect works fine for me but now i want data which is selected in tableview so i tried to create struct model with Encodable like below

class QuotationListDataModel: Encodable{
    var id: String?
    var quantity: String?
    var margin: String?
    var created_date: String?
    var part_number: String?
    var total_price: String?
    var freight: String?
    var fk_customer_id: String?

    init(id: String?,quantity: String?,margin: String?,created_date: String?,part_number: String,total_price: String,freight: String,fk_customer_id: String) {
        self.id = id
        self.quantity = quantity
        self.margin = margin
        self.created_date = created_date
        self.part_number = part_number
        self.total_price = total_price
        self.freight = freight
        self.fk_customer_id = fk_customer_id
    }
}

and i want out put like below

[
  {
   margin: 20,
   quantity: 10
   part_number: 15
   total_price: 1500
   freight: 100
  },
  {
   margin: 20,
   quantity: 10
   part_number: 15
   total_price: 1500
   freight: 100
  }
]


@IBAction func btnSelectAllTapped(_ sender: UIButton) {
    if btnSelectAll.titleLabel?.text == "Select All"{
        self.btnSelectAll.setTitle("DeSelect All", for: .normal)
        self.btnSelectAll.backgroundColor = UIColor(red: 119/255, green: 119/255, blue: 119/255, alpha: 1)
        self.btnShare.isHidden = false
        self.arrSelectedIds = quotationSeelctedData.map({ (quotation: QuotationListDataModel) -> String in quotation.id! }) 
         //Here when user select all i want all data into array
        self.tblListView.reloadData()
    }else{
        self.isSelectAll = false
        btnSelectAll.setTitle("Select All", for: .normal)
        btnSelectAll.backgroundColor = UIColor(red: 0/255, green: 175/255, blue: 239/255, alpha: 1)
        self.btnShare.isHidden = true
        self.arrSelectedIds.removeAll()
        print(arrSelectedIds)
        self.tblListView.reloadData()
    }
}

so i want selected data like this can anyone please help me to solve it out

Answer 1

you could create an array like var QuotationList = [QuotationListDataModel]() in didSelect delegate you could add the model to your list like

QuotationList = allDataArray[indexPath.row]

selected data will be added to your array

Answer 2

Try this:

let encoder = JSONEncoder()
encoder.outputFormatting = .prettyPrinted

do {
    let jsonData = try encoder.encode(MYARRAY)
    if let jsonString = String.init(data: jsonData, encoding: .utf8) {
        // That's your JSON string...
        print(jsonString)
    }
} catch {
    print("the encoding failed")
}

Anyway you need to fetch your items by ID... a better and faster solution would be to use the indexpath of the selected cells and extract them from your datasource.

EDIT: as stated by Joakim Danielson, add the desired CodingKeys.

Answer 3

To encode your rows you need to add an enum containing the properties you want to be part of the encoded data to your class

  enum CodingKeys: String, CodingKey {
      case margin, quantity, part_number, total_price, freight
  }

Then you can encode it like this

do {
    let data = try JSONEncoder().encode(arr)                                 
} catch {
    print(error)
}

Some questions to consider, why are all properties of type String and why are all optional?