The Composable Architecture

Co-authored-by: Stephen Celis <stephen.celis@gmail.com>

Examples/TicTacToe/Sources/Views-UIKit/AppViewController.swift

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+import AppCore
+import Combine
+import ComposableArchitecture
+import SwiftUI
+import UIKit
+
+struct UIKitAppView: UIViewControllerRepresentable {
+  let store: Store<AppState, AppAction>
+
+  func makeUIViewController(context: Context) -> AppViewController {
+    AppViewController(store: store)
+  }
+
+  func updateUIViewController(
+    _ uiViewController: AppViewController,
+    context: Context
+  ) {
+    // Nothing to do
+  }
+}
+
+class AppViewController: UINavigationController {
+  let store: Store<AppState, AppAction>
+  private var cancellables: Set<AnyCancellable> = []
+
+  init(store: Store<AppState, AppAction>) {
+    self.store = store
+    super.init(nibName: nil, bundle: nil)
+  }
+
+  required init?(coder aDecoder: NSCoder) {
+    fatalError("init(coder:) has not been implemented")
+  }
+
+  override func viewDidLoad() {
+    super.viewDidLoad()
+
+    self.store
+      .scope(state: \.login, action: AppAction.login)
+      .ifLet { [weak self] loginStore in
+        self?.setViewControllers([LoginViewController(store: loginStore)], animated: false)
+      }
+      .store(in: &self.cancellables)
+
+    self.store
+      .scope(state: \.newGame, action: AppAction.newGame)
+      .ifLet { [weak self] newGameStore in
+        self?.setViewControllers([NewGameViewController(store: newGameStore)], animated: false)
+      }
+      .store(in: &self.cancellables)
+  }
+}