UIMenuItem not showing in table

Question

I'm trying to add a custom action to UIMenuController for use of on a UITableViewCell and it doesn't appear when the menu is shown.

Edit: Revised code.

Here is the code:

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
    override func viewDidLoad() {
        ...
        UIMenuController.shared.menuItems = [UIMenuItem(title: "Test", action: #selector(test))]
        UIMenuController.shared.update()
    }

    // Table view setup
    // ...
    func tableView(_ tableView: UITableView, shouldShowMenuForRowAt indexPath: IndexPath) -> Bool {
        return true
    }
    func tableView(_ tableView: UITableView, canPerformAction action: Selector, forRowAt indexPath: IndexPath, withSender sender: Any?) -> Bool {
        return action == #selector(copy(_:)) || action == #selector(test)
    }
    func tableView(_ tableView: UITableView, performAction action: Selector, forRowAt indexPath: IndexPath, withSender sender: Any?) {
    }

    override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
        return action == #selector(test)
    }

    @objc func test() {
        print("Hello, world!")
    }
}

Answer 1

1. Your test function needs to be in the UITableViewCell subclass.
2. You need to implement canPerformAction(action: Selector, withSender sender: AnyObject?) -> Bool in that UITableViewCell subclass and return return action == #selector(test)
3. In UIMenuController.shared.menuItems = [UIMenuItem(title: "Test", action: #selector(test))] change #selector(test) to #selector(YourCellSubclass.test).
4. Keep the UITableViewDelegate methods you have in your view controller, and change || action == #selector(test) to || action == #selector(YourCellSubclass.test)

EDIT: Adding working example.

ViewController:

class ViewController: UITableViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        UIMenuController.shared.menuItems = [UIMenuItem(title: "Test", action: #selector(MyCell.test))]
        UIMenuController.shared.update()

        tableView.register(MyCell.self, forCellReuseIdentifier: "my")
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 3
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "my", for: indexPath) as! MyCell
        cell.textLabel?.text = "\(indexPath.row)"
        return cell
    }

    override func tableView(_ tableView: UITableView, shouldShowMenuForRowAt indexPath: IndexPath) -> Bool {
        return true
    }

    override func tableView(_ tableView: UITableView, canPerformAction action: Selector, forRowAt indexPath: IndexPath, withSender sender: Any?) -> Bool {
        return action == #selector(MyCell.test)
    }

    override func tableView(_ tableView: UITableView, performAction action: Selector, forRowAt indexPath: IndexPath, withSender sender: Any?) {
        // needs to be here
    }

}

Cell:

class MyCell: UITableViewCell {

    override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
        return action == #selector(test)
    }

    @objc func test() {
        print("works")
    }

}