How to select all rows and get its id in tableview when i click button outside of tableview in swift

Question

I have tableview with custom check box. here if i click select all button which is outside of tableview then i need to show all tableview rows selected with checkmark

code: tableview cell contains chkImg and chkBtn for row selection. with this code i can select and deselect multiple rows but if i click selectAllBtn i need all rows selected with cell.chkImg.image = UIImage(systemName: "checkmark") and all rows id in arrSelectedRows

how to do that please guid me

 var arrSelectedRows:[Int] = []

@IBAction func selectAllBtn(_ sender: UIButton) {
        tableView.reloadData()
}

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

let id = self.serviceList?.result?.services?[indexPath.row].id ?? 0

 if arrSelectedRows.contains(id){
     cell.chkImg.image = UIImage(systemName: "checkmark")
 }else{
     cell.chkImg.image = UIImage(named: "checkbox_inactive")
}
 cell.chkBtn.tag = id
 cell.chkBtn.addTarget(self, action: #selector(checkBoxSelection(_:)), for: .touchUpInside)

return cell
}

@objc func checkBoxSelection(_ sender:UIButton)
{
print(sender.tag)

if self.arrSelectedRows.contains(sender.tag){
    self.arrSelectedRows.remove(at: self.arrSelectedRows.index(of: sender.tag)!)
    print("arrayof selected row ids \(arrSelectedRows)")
}else{
    self.arrSelectedRows.append(sender.tag)
}
self.tableView.reloadData()
}

Answer 1

You can use Swift map function, by it you get all ids in your selectedArray

@IBAction func selectAllBtn(_ sender: UIButton) {
   let servicesCount = self.serviceList?.result?.services?.count ?? 0
   if servicesCount == self.arrSelectedRows {
       self.arrSelectedRows.removeAll()
   } else {
       self.arrSelectedRows = self.serviceList?.result?.services?.map({$0.id ?? 0})
   }
   tableView.reloadData()
}