Use action with selector in UIAction for menus in UIKit - swift

Question

Im trying to use action in the UIAction for my menu item in UIKit. So, For first button Im not able to apply action. It shows me error "Cannot find 'action' in scope"
I really want to use selector in this case. I want to know what's perfect way to take action on the selector
class MessageViewController : UIViewController, UITableViewDelegate {
private lazy var first = UIAction(title: "Edit", image: UIImage(systemName: "pencil.circle"), attributes: [], state: .off) { [self]_ in
action: #selector(self.RightSideBarButtonItemTapped(_:))
}
private lazy var second = UIAction(title: "Second", image: UIImage(systemName: "pencil.circle"), attributes: [.destructive], state: .on) { action in
print("Second")
#selector(self.sendMessageRightSideBarButtonItemTapped(_:))
}
private lazy var third = UIAction(title: "Third", image: UIImage(systemName: "pencil.circle"), attributes: [], state: .off) { action in
print("third")
}
private lazy var elements: [UIAction] = [first]
private lazy var menu = UIMenu(title: "new", children: elements)
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .white
navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: nil)
menu = menu.replacingChildren([first, second, third])
if #available(iOS 14.0, *) {
navigationItem.rightBarButtonItem?.menu = menu
}
}
Tried Solution from #Hangar Rash
private lazy var first = UIAction(title: "Edit", image: UIImage(systemName: "pencil.circle"), attributes: [], state: .off)
{ [unowned self] action in
self.RightSideBarButtonItemTapped(_:)
// Getting error on this line which says its " Function is unused "
}
override func viewDidLoad() {}
override func viewDidAppear(_ animated: Bool) {}
#objc func RightSideBarButtonItemTapped(_ sender:UIBarButtonItem!)
{
let vc = IceWorldView()
present(vc, animated: true)
}

Answer 1

Your first action has two issues:
a syntax error with action
there's no need to use #selector. Just call the method directly
Change:
private lazy var first = UIAction(title: "Edit", image: UIImage(systemName: "pencil.circle"), attributes: [], state: .off) { [self]_ in
action: #selector(self.RightSideBarButtonItemTapped(_:))
}
to:
private lazy var first = UIAction(title: "Edit", image: UIImage(systemName: "pencil.circle"), attributes: [], state: .off) { [unowned self] action in
self.RightSideBarButtonItemTapped(someButton)
}
Your RightSideBarButtonItemTapped expects a UIBarButtonItem parameter but you don't have one in the menu. You can either made a dummy button instance to pass in or you can change the RightSideBarButtonItemTapped so it doesn't take any parameters. You don't seem to use the passed in sender anyway.
Fix the use of #selector in your second action as well.