Segue not getting selected row number

Question

I am passing data from a table view controller to a detail view. I tried using indexPath.row directly in my prepareForSegue method, however it displays

Answer 1

//In didSelectRowAtIndexPath, you use this code:

func tableView(tvMain: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

        self.performSegueWithIdentifier("yourSegueName", sender: nil)

    }

//And prepareForSegue to get IndexPath and send your value

override func prepareForSegue(segue: UIStoryboardSegue,
        sender: AnyObject!){

            let indexPath : NSIndexPath = self.yourTableView.indexPathForSelectedRow()!
            //make sure that the segue is going to secondViewController
            let detailsVC = segue.destinationViewController as DetailTableViewController
            detailsVC.selectedPersonName = "\(people[indexPath.row])"

    }