如何从在情节提要中定义了segue的推送的vc执行segue

Question

Here is the thing: my storyboard as a SettingViewController (after named SVC) and a StationsViewcontroller from which the latter is wired to a details view controller by the "openDetails" segue.

For practical reasons, my SVC can push several levels of specifics settings view controllers, which I did not defined in the storyboard.

At one point, one of those vc pushes the StationsViewController, which then can issue a performSegue to the detail: unfortunately, I get the "openDetails" segue is not defined.

What should I do to fix the issue?

--

The code has nothing peculiar, in the SettingsViewController, I push others VC, including the StationsViewController:

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    // Gracefully remove the selection
    tableView.deselectRow(at: indexPath, animated: true)

    guard let section = MainSections(rawValue: indexPath.section) else { return }

    switch section {
    case .stations:
        let vc = StationsViewController()
        // Do no segue at dismiss
        vc.onlyDismiss = true
        vc.didDismiss = {
            self.navigationController?.popViewController(animated: true)
        }
        push(vc, hideNavigation: true)

        // Blah blah

And in the StationsViewController where I want to get to the details vc, I perform the segue:

func openPoiDetails(_ gs: GasStation) {

    poiDetails = gs

    performSegue(withIdentifier: "poiDetails", sender: nil)

    // Blah blah

The storyboard is as follows, and we can see the StationsViewController on the left is wired to the details vc via the "openDetails" segue:

Answer 1

The problem is that your StationsViewController was just created from its initializer and the storyboard knows nothing about it. Therefore, you can't use the segue. Instead, you need to ask the storyboard to instantiate the StationsViewController :

Replace:

let vc = StationsViewController()

with:

let vc = self.storyboard?.instantiateViewController(withIdentifier: "StationsViewController") as! StationsViewController

Make sure you set the "StationsViewController" as the Storyboard ID in the Identify Inspector in Xcode.