Table view marking more than one cell Swift 3 - ios

Question

I have a VERY annoying problem.
I have a tableView with more or less 50 cells, displaying some options to which I can select the ones I want. I read in Apple's documentation that by default the cells are reused when they are not displayed. With this, if I select the first cell, every 6 cells 1 is marked, that is, if I select the first 6 cells, ALL cells in the table are marked!
My table view allows multiple selections. The selection is being made like this:
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.cellForRow(at: indexPath)?.accessoryType = UITableViewCellAccessoryType.checkmark
}
How do I solve this? I know you have such a "prepareForReuse ()" for the subclass, would that be the solution? If so, can you give me an example of how you would do it?

Answer 1

here is code it may help you
var arr_selectedindePath = NSMutableArray()
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
{
if arr_selectedindePath .contains(indexPath) {
arr_selectedindePath .remove(indexPath)
tableView.cellForRow(at: indexPath)?.accessoryType = UITableViewCellAccessoryType.none
}
else
{
arr_selectedindePath .add(indexPath)
tableView.cellForRow(at: indexPath)?.accessoryType = UITableViewCellAccessoryType.checkmark
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell: UITableViewCell = tableView.dequeueReusableCell(withIdentifier: "cell")!
if arr_selectedindePath .contains(indexPath) {
cell.accessoryType = .checkmark
}
else
{
cell.accessoryType = .none
}
}

Answer 2

You will need to update your data model accordingly so that when cellForRowAtIndexPath is called it displays cells with updated content.
If you don't use a datamodel you will need to store the indexPath's in a mutable array and make a check whether the current indexPath is marked or not.
Hope this helps.

Answer 3

In your custom cell
1.Create a delegate
protocol CellDelegate {
func didTapOnButton(_ cell:Cell)
}
2. Declare delegate
var delegate:CellDelegate?
3.Override this method
override func prepareForReuse() {
super.prepareForReuse()
self.delegate = nil
}
#IBAction func buttonTapped()
{
self.delegate!.didTapOnButton(self)
}
In your tableview controller
1.Implement delegate method
2.Inside cellForRowAtIndexPath assign tag value to cell.button
3.implement this method
func didTapOnButton(_ cell: Cell) {
print("off button clicked at index \(cell.button.tag)")
}