UITableViewDelegate didSelectRowAt Conditionally Execute based on Row

Question

I am interested in being able to conditionally execute code based on what row a user selects. Is there a way to associate an identifier with each row (cell) in cellForRowAt to help distinguish which row is selected to be used in DidSelectRowAt delegate?

Answer 1

Yes. You are correct in using the DidSelectRowAt method. If you have a view controller with the table, the view controller will have to adopt the two standard delegates: UITableViewDataSource, UITableViewDelegate.

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

    @IBOutlet weak var table: UITableView!
    let message:[String] = ["Hello", "World", "How", "Are", "You"]

    /* Table with five rows */
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 5
    }

    /*Have a simple table with cells being the words in the message */
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = UITableViewCell()
        cell.textLabel?.text = message[indexPath.row]
        return cell
    }

    /*Optional method to determine which row was pressed*/
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){
        print("I'm row number "+String(indexPath.row))
    }

    /*set the table's delegate and datasource to the view controller*/
    override func viewDidLoad() {
        super.viewDidLoad()
        self.table.delegate = self
        self.table.dataSource = self
    }
}

This would output: I'm row number 1 Recall that indexes start at zero.