Working with Navigation

let newViewController = MyViewController()
navigationController?.pushViewController(newViewController, animated: true)

navigationItem.title = "Home"

navigationBar.backgroundColor = .systemBackground
navigationBar.tintColor = .systemBlue

let newViewController = MyViewController()
navigationController?.pushViewController(newViewController, animated: true)

navigationController?.popViewController(animated: true)

let navBar = UINavigationBar()
navBar.barTintColor = UIColor.systemBlue

let attributes: [NSAttributedString.Key: Any] = [
    .foregroundColor: UIColor.white,
    .font: UIFont.boldSystemFont(ofSize: 18)
]
navBar.titleTextAttributes = attributes

struct ContentView: View {
    var body: some View {
        NavigationView {
            Text("Main Content")
                .navigationBarItems(
                    leading: Button("Back") {
                        // Handle back action
                    },
                    trailing: Button("Save") {
                        // Handle save action
                    }
                )
        }
    }
}

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Customize the back button title
        self.navigationItem.backBarButtonItem = UIBarButtonItem(
            title: "Back",
            style: .plain,
            target: nil,
            action: nil
        )
    }
}

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Set custom back indicator image
        let backImage = UIImage(named: "custom_back_arrow")
        self.navigationController?.navigationBar.backIndicatorImage = backImage
        self.navigationController?.navigationBar.backIndicatorTransitionMaskImage = backImage
    }
}

override func viewDidLoad() {
    super.viewDidLoad()
    
    navigationController?.navigationBar.prefersLargeTitles = true
    navigationItem.largeTitleDisplayMode = .automatic
}

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        self.navigationController?.isNavigationBarHidden = true
    }
}

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        self.navigationController?.isNavigationBarHidden = false
    }
}

class MyNavigationController: UINavigationController, UINavigationControllerDelegate {
    func navigationController(_ navigationController: UINavigationController, willShow viewController: UIViewController, animated: Bool) {
        print("Will show view controller: \(viewController.title ?? "")")
    }
    
    func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
        print("Did show view controller: \(viewController.title ?? "")")
    }
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "ShowDetail" {
        let detailVC = segue.destination as! DetailViewController
        detailVC.item = selectedItem
    }
}

class MasterViewController: UIViewController {
    var dataArray = ["Item 1", "Item 2", "Item 3"]
    
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if let detailVC = segue.destination as? DetailViewController,
           let indexPath = tableView.indexPathForSelectedRow {
            detailVC.selectedItem = dataArray[indexPath.row]
        }
    }
}

class DetailViewController: UIViewController {
    var onDataReceived: ((String) -> Void)?
    
    @IBAction func saveButtonTapped(_ sender: UIButton) {
        onDataReceived?(textField.text ?? "")
        dismiss(animated: true)
    }
}