Swift 3.0 multiple selection with select all cell

Question

I have added data in table view and I have manually added \"select all\" option to the list at first position, now when the user selects the first option which is \'select a

Answer 1

I think you are using only one section in the table view. I suggest you use two sections in the table view, so that first section will contain only one row (Select All) and the second section will contain other options. When you click on Select All, that is in the first row of the first section you can make all the rows in the second section as selected while reloading the table view.

// MARK: -  struct for cell item
    struct CellItem {
    var name : String
    var isSelected:Bool! = false
    init(name: String) {
           self.name = name
         }
    }

class ViewController: UITableViewController {

@IBOutlet var viewTable: UITableView!
// Declare a boolean varaible to toggle the checkbox in the first section of table view
var isSelectAllSelected : Bool = false
var cellData: [CellItem] = []

override func viewDidLoad() {
    super.viewDidLoad()
    cellData = [CellItem(name: "Luke Skywalker"),CellItem(name: "Leia Organa"),CellItem(name: "Advik Shah"),CellItem(name: "Aarav Modi")]
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}

// MARK: - Table view data source

override func numberOfSections(in tableView: UITableView) -> Int {
    return 2
}

override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    if section == 0 {
         return 1
    }
    else
    {
        return cellData.count
    }
}

override func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
    return 0
}

// MARK: -  Table view delegates

override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    return 60

}

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{
    let cell = TableCell()
    cell.selectionStyle = .none

    if indexPath.section == 0 {
        cell.textLabel?.text = "Select All"
        if isSelectAllSelected{
            cell.accessoryType = .checkmark
        }
        else{
            cell.accessoryType = .none
        }

    }
    else
    {
        cell.textLabel?.text = cellData[indexPath.row].name
        if cellData[indexPath.row].isSelected{
            cell.accessoryType = .checkmark
        }
        else{
            cell.accessoryType = .none
        }

    }
    return cell
}


override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    if indexPath.section == 0
    {
        cellData[indexPath.row].isSelected = !cellData[indexPath.row].isSelected
        isSelectAllSelected = cellData[indexPath.row].isSelected
        for index in cellData.indices
        {
            cellData[index].isSelected = cellData[indexPath.row].isSelected
        }
    }
    else
    {
        cellData[indexPath.row].isSelected = !cellData[indexPath.row].isSelected
        if cellData.filter({ $0.isSelected }).count == cellData.count
        {
            isSelectAllSelected = true
        }
        else
        {
            isSelectAllSelected = false
        }

    }
    viewTable.reloadData()
} }