iosswiftuitableviewtableviewaccessorytype

Selecting TableView Cell Activates Checkmark in Rows in Multiple Sections


I've implemented checkmarks (when row is selected) with the following code in cellForRowAt:

// Add a checkmark to row when selected
    if selectedIngredients.contains(indexPath.row) {
        cell.accessoryType = .checkmark
    } else {
        cell.accessoryType = .none
    }

However, when I select a row, that index.row from each section gets the checkmark: enter image description here

This seems like it could be because I'm only specifying the indexPath.row, but not the section. How can I code this so that only the selected row within the section I selected gets the checkmark?


Solution

  • use data store for save checkmarks like this:

    var selectedIngredients: Set<IndexPath> = [] // use set for unique save
    

    then didSelect callBack:

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){
            if self.selectedIngredients.contains(indexPath) {
                self.selectedIngredients.remove(indexPath)
                
            } else {
                self.selectedIngredients.insert(indexPath)
            }
            
            self.tableView.reloadData()
        }
    

    after reload in CellForRow:

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    if selectedIngredients.contains(indexPath) {
            cell.accessoryType = .checkmark
        } else {
            cell.accessoryType = .none
        }
    }
    

    If you want it to have only one Row contain checkmark:

    var selectedIngredients: IndexPath? = nil
    

    and didSelect CallBack:

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){
                self.selectedIngredients = indexPath
            }
    

    and finally:

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        if selectedIngredients == indexPath {
                cell.accessoryType = .checkmark
            } else {
                cell.accessoryType = .none
            }
        }