Why I am not successfull to use segue programmatically? - swift

Question

I am using storyboard for ScreenOne, and I did not use the storyboard for ScreenTwo, I was coding as programmatically and until now no problem for me, but I am still not success to declare
"storyboardIdentifier" for ScreenTwo. Here there is an example but I don't understand how I will handle this example inside of the app. Any idea will be appreciated.
Screenshot:
ScreenTwo:
class ForgotPasswordEmailCheckController: UIViewController {
var storyboardId: String {
return (value(forKey: "ForgotPasswordEmailCheckController") as? String)!
}

Answer 1

Storyboard Controller (Also Embed this controller in Navigation Controller):
class FirstVC: UIViewController {
#IBOutlet weak var btn: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
btn.addAction(UIAction(handler: { action in
let secondVC = SecVC()
self.navigationController?.pushViewController(secondVC, animated: true)
}), for: .touchUpInside)
}
}
Second Viewcontroller:
class SecVC: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.blue
}
}

Answer 2

This is programmatically way to do it:
in sceneDelegate set your initial navigation controller:
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
guard let windowScene = (scene as? UIWindowScene) else { return }
window = UIWindow(windowScene: windowScene)
window?.makeKeyAndVisible()
let controller = UINavigationController(rootViewController: MyController())
window?.rootViewController = controller
}
now configure your navigationBar in firstController, use my extension to do it:
extension UIViewController {
func configureNavigationBar(largeTitleColor: UIColor, backgoundColor: UIColor, tintColor: UIColor, title: String, preferredLargeTitle: Bool) {
if #available(iOS 13.0, *) {
let navBarAppearance = UINavigationBarAppearance()
navBarAppearance.configureWithOpaqueBackground()
navBarAppearance.largeTitleTextAttributes = [.foregroundColor: largeTitleColor]
navBarAppearance.titleTextAttributes = [.foregroundColor: largeTitleColor]
navBarAppearance.backgroundColor = backgoundColor
navigationController?.navigationBar.standardAppearance = navBarAppearance
navigationController?.navigationBar.compactAppearance = navBarAppearance
navigationController?.navigationBar.scrollEdgeAppearance = navBarAppearance
navigationController?.navigationBar.prefersLargeTitles = preferredLargeTitle
navigationItem.largeTitleDisplayMode = .always
navigationController?.navigationBar.tintColor = tintColor
navigationItem.title = title
} else {
// Fallback on earlier versions
navigationController?.navigationBar.barTintColor = backgoundColor
navigationController?.navigationBar.tintColor = tintColor
navigationController?.navigationBar.isTranslucent = false
navigationItem.title = title
}
}
}
This is your first controller looks like:
class MyController: UIViewController {
let button = UIButton() // declare your button
override func viewDidLoad() {
super.viewDidLoad()
configureNavigationBar(largeTitleColor: .white, backgoundColor: .black, tintColor: .white, title: "My Vc", preferredLargeTitle: true) // set nav bar with exetnsion
view.backgroundColor = .white
view.addSubview(button)
button.backgroundColor = .systemBlue
button.layer.cornerRadius = 9
button.setTitle("My Button", for: .normal)
button.addTarget(self, action: #selector (handelGoToSecondVc), for: .touchUpInside)
button.translatesAutoresizingMaskIntoConstraints = false
button.leadingAnchor.constraint(equalTo: self.view.leadingAnchor, constant: 16).isActive = true
button.trailingAnchor.constraint(equalTo: self.view.trailingAnchor, constant: -16).isActive = true
button.heightAnchor.constraint(equalToConstant: 50).isActive = true
button.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: -10).isActive = true
}
#objc func handelGoToSecondVc() {
let controller = SecondController()
controller.title = "second Vc"
navigationController?.pushViewController(controller, animated: true)
}
}
second controller:
class SecondController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .green
}
}
This is the result:
Complete code:
import UIKit
class MyController: UIViewController {
let button = UIButton() // declare your button
override func viewDidLoad() {
super.viewDidLoad()
configureNavigationBar(largeTitleColor: .white, backgoundColor: .black, tintColor: .white, title: "My Vc", preferredLargeTitle: true) // set nav bar with exetnsion
view.backgroundColor = .white
view.addSubview(button)
button.backgroundColor = .systemBlue
button.layer.cornerRadius = 9
button.setTitle("My Button", for: .normal)
button.addTarget(self, action: #selector (handelGoToSecondVc), for: .touchUpInside)
button.translatesAutoresizingMaskIntoConstraints = false
button.leadingAnchor.constraint(equalTo: self.view.leadingAnchor, constant: 16).isActive = true
button.trailingAnchor.constraint(equalTo: self.view.trailingAnchor, constant: -16).isActive = true
button.heightAnchor.constraint(equalToConstant: 50).isActive = true
button.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: -10).isActive = true
}
#objc func handelGoToSecondVc() {
let controller = SecondController()
controller.title = "second Vc"
navigationController?.pushViewController(controller, animated: true)
}
}
class SecondController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .green
}
}
extension UIViewController {
func configureNavigationBar(largeTitleColor: UIColor, backgoundColor: UIColor, tintColor: UIColor, title: String, preferredLargeTitle: Bool) {
if #available(iOS 13.0, *) {
let navBarAppearance = UINavigationBarAppearance()
navBarAppearance.configureWithOpaqueBackground()
navBarAppearance.largeTitleTextAttributes = [.foregroundColor: largeTitleColor]
navBarAppearance.titleTextAttributes = [.foregroundColor: largeTitleColor]
navBarAppearance.backgroundColor = backgoundColor
navigationController?.navigationBar.standardAppearance = navBarAppearance
navigationController?.navigationBar.compactAppearance = navBarAppearance
navigationController?.navigationBar.scrollEdgeAppearance = navBarAppearance
navigationController?.navigationBar.prefersLargeTitles = preferredLargeTitle
navigationItem.largeTitleDisplayMode = .always
navigationController?.navigationBar.tintColor = tintColor
navigationItem.title = title
} else {
// Fallback on earlier versions
navigationController?.navigationBar.barTintColor = backgoundColor
navigationController?.navigationBar.tintColor = tintColor
navigationController?.navigationBar.isTranslucent = false
navigationItem.title = title
}
}
}