Swift 4 prepare(for segue:) not being called

Question

I have a split view controller and its not calling my prepare(for segue:) method when I click on an item in my table view. Here is my prepare(for segue:) method:

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        print("Here");
        if segue.identifier == "showPOsDetail" {
            if let indexPath = tableView.indexPathForSelectedRow {
                let object = objects[indexPath.row] as! NSDate
                let controller = (segue.destination as! UINavigationController).topViewController as! POsDetail
                controller.detailItem = object
                controller.navigationItem.leftBarButtonItem = splitViewController?.displayModeButtonItem
                controller.navigationItem.leftItemsSupplementBackButton = true
            }
        }
    }

And here is a screenshot of my storeyboard. I have no idea why this method is not being called.

Ive been trying to figure with out for days now and I am super duper frustrated that its not working.

Here is my full Master Controller:

import UIKit

class POsMaster: UITableViewController {

    var POsDetailController: POsDetail? = nil
    var objects = [Any]()


    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view, typically from a nib.
        navigationItem.leftBarButtonItem = editButtonItem

        let addButton = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(insertNewObject(_:)))
        navigationItem.rightBarButtonItem = addButton
        if let split = splitViewController {
            let controllers = split.viewControllers
            POsDetailController = (controllers[controllers.count-1] as! UINavigationController).topViewController as? POsDetail
        }

    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @objc
    func insertNewObject(_ sender: Any) {
        objects.insert(NSDate(), at: 0)
        let indexPath = IndexPath(row: 0, section: 0)
        tableView.insertRows(at: [indexPath], with: .automatic)
    }

    // MARK: - Segues

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        print("Here");
        if segue.identifier == "showPOsDetail" {
            if let indexPath = tableView.indexPathForSelectedRow {
                let object = objects[indexPath.row] as! NSDate
                let controller = (segue.destination as! UINavigationController).topViewController as! POsDetail
                controller.detailItem = object
                controller.navigationItem.leftBarButtonItem = splitViewController?.displayModeButtonItem
                controller.navigationItem.leftItemsSupplementBackButton = true
            }
        }
    }

    // MARK: - Table View

    override func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return objects.count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "POCell", for: indexPath)

        let object = objects[indexPath.row] as! NSDate
        cell.textLabel!.text = object.description
        return cell
    }

    override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
        // Return false if you do not want the specified item to be editable.
        return true
    }

    override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
        if editingStyle == .delete {
            objects.remove(at: indexPath.row)
            tableView.deleteRows(at: [indexPath], with: .fade)
        } else if editingStyle == .insert {
            // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
        }
    }


}

Answer 1

When you connect your segue in storyboard a pop up opens and you have to check if you have set your segue from the Selection group, instead of the Accessory group, the Selection group connection will call your prepareForSegue: method.