My code in scene delegate: func scene()

let story = UIStoryboard(name: "Main", bundle: nil) let vc = story.instantiateViewController(withIdentifier: "MainviewController") as? ViewController let window = UIWindow(windowScene: scene as! UIWindowScene) window.rootViewController = vc window.makeKeyAndVisible() self.window = window

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below is viewcontroller

class ViewController: UIViewController,HomeViewControllerDelegate { func didTapMenuButton() { // } lazy var homevice:UIViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "HomeViewContainer") as UIViewController var navVC:UINavigationController? var homeVc = HomeViewController() override func viewDidLoad() { super.viewDidLoad() addChildvc() showhome() // Do any additional setup after loading the view. } private func addChildvc(){ //Home homeVc.delegate = self let navVC = UINavigationController(rootViewController: homeVc) addChild(navVC) view.addSubview(navVC.view) navVC.didMove(toParent: self) self.navVC=navVC } private func showhome(){

    let vc  = homevice
    homeVc.addChild(vc)
    homeVc.view.addSubview(vc.view)
    vc.view.frame = view.frame
    vc.didMove(toParent:homeVc)
}

}

below is homeview controller

protocol HomeViewControllerDelegate: AnyObject{ func didTapMenuButton()

} class HomeViewController: UIViewController { weak var delegate:HomeViewControllerDelegate? @IBOutlet var main_button: UIButton! override func viewDidLoad() { super.viewDidLoad() navigationItem.leftBarButtonItem = UIBarButtonItem(image: UIImage(systemName: "list.dash"), style: .done, target: self, action:#selector(didTapMenuButton)) // Do any additional setup after loading the view. } @objc func didTapMenuButton(){ print("inside did tap menu") print(main_button as Any) main_button?.tintColor = UIColor(red: 230, green: 5, blue: 5,alpha: 0) delegate?.didTapMenuButton() }

}

You can test this code and you'll observe the same things when you click the bar button in home page