common Navigation Button Action another class - ios

Question

I have made common Navigation bar For all View Controllers. But I need to button action on that which calls I am calling the common navigation bar
#objc extension UIViewController {
#objc func setBarButtonItem(titleLabel: String)
{
let view = UIView.init(frame: CGRect.init(x: 0, y: 0, width: 200 + 4, height: 38))
let Nextbtn = UIButton(type: .custom)
Nextbtn.frame = CGRect(x: 0, y: 0, width: 30, height: 30)
Nextbtn.addTarget(self, action: #selector(NextButtonClicked), for: .touchUpInside)
view.addSubview(Nextbtn)
self.navigationItem.setLeftBarButton(UIBarButtonItem(customView: view), animated: true)
/*
#objc func NextButtonClicked()
{
}*/
}
}
Calling Controller---> setBackBarButton("hello...")
Button is called if I made button action method on this class. But I want to make button action method func NextButtonClicked() on this calling Calling Controller class,Or Any approach we can access the button action on this class.
#objc func NextButtonClicked()
{
}

Answer 1

You can just Create BaseViewController Instead extension and allow all ViewControllers to inherit From this BaseViewController
BaseViewController:
import UIKit
class BaseViewController: UIViewController {
typealias CompletionBarButtonClicked = (()-> Void)
var completionBarItemClicked:CompletionBarButtonClicked?
override func viewDidLoad() {
super.viewDidLoad()
}
#objc func setBarButtonItem(titleLabel: String, completion :#escaping CompletionBarButtonClicked)
{
self.completionBarItemClicked = completion
let view = UIView.init(frame: CGRect.init(x: 0, y: 0, width: 200 + 4, height: 38))
let Nextbtn = UIButton(type: .custom)
Nextbtn.frame = CGRect(x: 0, y: 0, width: 30, height: 30)
Nextbtn.addTarget(self, action: #selector(NextButtonClicked), for: .touchUpInside)
view.addSubview(Nextbtn)
self.navigationItem.setLeftBarButton(UIBarButtonItem(customView: view), animated: true)
}
#objc func NextButtonClicked()
{
if let completionHandler = completionBarItemClicked{
completionHandler()
}
}
}
Example ViewController:
import UIKit
class ViewController: BaseViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.setBarButtonItem(titleLabel: "test") {
/// your action There
}
}
}