Migrate ios_books SceneDelegate for UIScene

add_to_app/books/ios_books/IosBooks/SceneDelegate.swift

@@ -2,31 +2,68 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import Flutter
 import UIKit
 
-class SceneDelegate: UIResponder, UIWindowSceneDelegate {
+class SceneDelegate: UIResponder, UIWindowSceneDelegate, FlutterSceneLifeCycleProvider
+{
+  var sceneLifeCycleDelegate: FlutterPluginSceneLifeCycleDelegate =
+    FlutterPluginSceneLifeCycleDelegate()
 
   var window: UIWindow?
 
   func scene(
-    _ scene: UIScene, willConnectTo session: UISceneSession,
+    _ scene: UIScene,
+    willConnectTo session: UISceneSession,
     options connectionOptions: UIScene.ConnectionOptions
   ) {
-    guard let _ = (scene as? UIWindowScene) else { return }
+    sceneLifeCycleDelegate.scene(
+      scene,
+      willConnectTo: session,
+      options: connectionOptions
+    )
   }
 
   func sceneDidDisconnect(_ scene: UIScene) {
+    sceneLifeCycleDelegate.sceneDidDisconnect(scene)
+  }
+
+  func sceneWillEnterForeground(_ scene: UIScene) {
+    sceneLifeCycleDelegate.sceneWillEnterForeground(scene)
   }
 
   func sceneDidBecomeActive(_ scene: UIScene) {
+    sceneLifeCycleDelegate.sceneDidBecomeActive(scene)
   }
 
   func sceneWillResignActive(_ scene: UIScene) {
+    sceneLifeCycleDelegate.sceneWillResignActive(scene)
   }
 
-  func sceneWillEnterForeground(_ scene: UIScene) {
+  func sceneDidEnterBackground(_ scene: UIScene) {
+    sceneLifeCycleDelegate.sceneDidEnterBackground(scene)
   }
 
-  func sceneDidEnterBackground(_ scene: UIScene) {
+  func scene(
+    _ scene: UIScene,
+    openURLContexts URLContexts: Set<UIOpenURLContext>
+  ) {
+    sceneLifeCycleDelegate.scene(scene, openURLContexts: URLContexts)
+  }
+
+  func scene(_ scene: UIScene, continue userActivity: NSUserActivity) {
+    sceneLifeCycleDelegate.scene(scene, continue: userActivity)
+  }
+
+  func windowScene(
+    _ windowScene: UIWindowScene,
+    performActionFor shortcutItem: UIApplicationShortcutItem,
+    completionHandler: @escaping (Bool) -> Void
+  ) {
+    sceneLifeCycleDelegate.windowScene(
+      windowScene,
+      performActionFor: shortcutItem,
+      completionHandler: completionHandler
+    )
   }
 }