Navigation added with Bar Buttons between screens

AppNavigatorExample/Navigator/AppNavigator.swift

@@ -8,14 +8,14 @@
 
 import UIKit
 
-fileprivate protocol NavigatorDestination {
+protocol NavigatorDestination {
     associatedtype PresentationStyle
     static var `default`: Self { get }
     var presentationStyle: PresentationStyle { get }
     var viewController: UIViewController { get }
 }
 
-fileprivate protocol Navigator {
+protocol Navigator {
     associatedtype Destination: NavigatorDestination
     associatedtype PresentationStyle
     func navigate(to destination: Destination,
@@ -114,7 +114,7 @@ class AppNavigator: Navigator {
     func navigate(basedOn url: URL,
                   with presentationStyle: PresentationStyle? = nil,
                   animated: Bool = true) -> UIViewController? {
-        guard url.scheme == "AppNavigatorExample",
+        guard url.scheme?.lowercased() == "AppNavigatorExample".lowercased(),
             let host = url.host,
             let destination = Destination(rawValue: host) else {
                 return nil
@@ -130,7 +130,11 @@ class AppNavigator: Navigator {
     static func navigate(basedOn url: URL, with appDelegate: UIApplicationDelegate) {
         if let navigationController = appDelegate.window??.rootViewController as? UINavigationController {
             let appNavigator = AppNavigator(with: navigationController)
-            appNavigator.navigate(basedOn: url)
+            let viewController = appNavigator.navigate(basedOn: url)
+
+            if let newsViewController = viewController as? NewsViewController {
+                newsViewController.newsLabelText = "News - Opened from URL"
+            }
         }
     }
 }

AppNavigatorExample/View/HomeViewController.swift

@@ -10,9 +10,15 @@ import UIKit
 
 class HomeViewController: UIViewController {
 
+    var appNavigator = AppNavigator()
+
     override func viewDidLoad() {
         super.viewDidLoad()
-        // Do any additional setup after loading the view.
+
+        appNavigator.navigationController = navigationController
+
+        addProfileButton()
+        addNewsButton()
         addLabel()
     }
 
@@ -30,5 +36,31 @@ class HomeViewController: UIViewController {
             ])
     }
 
+    private func addProfileButton() {
+        let profileButton = UIBarButtonItem(title: "Profile",
+                                          style: UIBarButtonItem.Style.plain,
+                                          target: self,
+                                          action: #selector(openProfile))
+        navigationItem.rightBarButtonItem = profileButton
+    }
+
+    private func addNewsButton() {
+        let newsButton = UIBarButtonItem(title: "News",
+                                         style: UIBarButtonItem.Style.plain,
+                                         target: self,
+                                         action: #selector(openNews))
+        navigationItem.leftBarButtonItem = newsButton
+    }
+
+    @objc private func openProfile() {
+        appNavigator.navigate(to: .profile)
+    }
+
+    @objc private func openNews() {
+        if let newsViewController = appNavigator.navigate(to: .news) as? NewsViewController {
+            newsViewController.newsLabelText = "News - Opened from Home"
+        }
+    }
+
 }
 

AppNavigatorExample/View/LoginViewController.swift

@@ -12,7 +12,8 @@ class LoginViewController: UIViewController {
 
     override func viewDidLoad() {
         super.viewDidLoad()
-        // Do any additional setup after loading the view.
+
+        addHomeButton()
         addLabel()
     }
 
@@ -30,6 +31,17 @@ class LoginViewController: UIViewController {
             ])
     }
 
+    private func addHomeButton() {
+        let homeButton = UIBarButtonItem(title: "Home",
+                                            style: UIBarButtonItem.Style.plain,
+                                            target: self,
+                                            action: #selector(openHome))
+        navigationItem.rightBarButtonItem = homeButton
+    }
+
+    @objc private func openHome() {
+        AppNavigator(with: navigationController).navigate(to: .home)
+    }
 }
 
 

AppNavigatorExample/View/NewsViewController.swift

@@ -10,24 +10,38 @@ import UIKit
 
 class NewsViewController: UIViewController {
 
+    var newsLabelText: String = "News"
+
     override func viewDidLoad() {
         super.viewDidLoad()
-        // Do any additional setup after loading the view.
+
         addLabel()
+        addCloseButton()
     }
 
     private func addLabel() {
-        let label = UILabel()
-        label.text = "News"
+        let newsLabel = UILabel()
+        newsLabel.text = newsLabelText
 
-        view.addSubview(label)
+        view.addSubview(newsLabel)
         view.backgroundColor = .white
 
-        label.translatesAutoresizingMaskIntoConstraints = false
+        newsLabel.translatesAutoresizingMaskIntoConstraints = false
         NSLayoutConstraint.activate([
-            label.centerXAnchor.constraint(equalTo: view.centerXAnchor),
-            label.centerYAnchor.constraint(equalTo: view.centerYAnchor)
+            newsLabel.centerXAnchor.constraint(equalTo: view.centerXAnchor),
+            newsLabel.centerYAnchor.constraint(equalTo: view.centerYAnchor)
             ])
     }
 
+    private func addCloseButton() {
+        let closeButton = UIBarButtonItem(title: "Close",
+                                          style: UIBarButtonItem.Style.plain,
+                                          target: self,
+                                          action: #selector(closeViewController))
+        navigationItem.leftBarButtonItem = closeButton
+    }
+
+    @objc private func closeViewController() {
+        dismiss(animated: true, completion: nil)
+    }
 }

AppNavigatorExample/View/ProfileViewController.swift

@@ -12,7 +12,7 @@ class ProfileViewController: UIViewController {
 
     override func viewDidLoad() {
         super.viewDidLoad()
-        // Do any additional setup after loading the view.
+
         addLabel()
     }