It is possible to use an existing ViewController with PerformSegueWithIdentifier?

Question

I use the method performSegueWithIdentifier:sender: to open a new ViewController from a storyboard-file programmatically. This works like a charm.<

Answer 1

Firstly you would be going against Apple's design in Using Segues: "A segue always presents a new view controller".

To understand why it might help to know that what a segue does is create a new view controller and then the perform calls either showViewController or showDetailViewController depending on what kind of segue it is. So if you have an existing view controller just call those methods! e.g.

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    Event *object = [self.fetchedResultsController objectAtIndexPath:indexPath];
    self.detailViewController.detailItem = object;
    [self showDetailViewController:self.detailViewController.navigationController sender:self];
}