(Draft) Update iOS snippets to reflect UISceneDelegate adoption

sites/docs/src/content/add-to-app/ios/add-flutter-screen.md

@@ -101,6 +101,19 @@ class AppDelegate: FlutterAppDelegate { // More on the FlutterAppDelegate.
     GeneratedPluginRegistrant.register(with: self.flutterEngine);
     return super.application(application, didFinishLaunchingWithOptions: launchOptions);
   }
+
+  override func application(
+    _ application: UIApplication,
+    configurationForConnecting connectingSceneSession: UISceneSession,
+    options: UIScene.ConnectionOptions
+  ) -> UISceneConfiguration {
+    let configuration = UISceneConfiguration(
+      name: nil,
+      sessionRole: connectingSceneSession.role
+    )
+    configuration.delegateClass = FlutterSceneDelegate.self
+    return configuration
+  }
 }
 ```
 
@@ -137,6 +150,15 @@ exposed as a property, on app startup in the app delegate.
   return [super application:application didFinishLaunchingWithOptions:launchOptions];
 }
 
+- (UISceneConfiguration *)application:(UIApplication *)application
+    configurationForConnectingSceneSession:(UISceneSession *)connectingSceneSession
+                                   options:(UISceneConnectionOptions *)options {
+    UISceneConfiguration *configuration = [[UISceneConfiguration alloc] initWithName:nil
+                                                                         sessionRole:connectingSceneSession.role];
+    configuration.delegateClass = [FlutterSceneDelegate class];
+    return configuration;
+}
+
 @end
 ```
 
@@ -375,6 +397,11 @@ The `FlutterAppDelegate` performs functions such as:
 * Keeping the Flutter connection open
   in debug mode when the phone screen locks.
 
+As of Flutter 3.41, `UIScene` support is the default for iOS apps.
+When using `FlutterAppDelegate`, you should also ensure that your app
+uses `FlutterSceneDelegate` (or a subclass) to receive scene lifecycle
+events, such as [`scene(_:openURLContexts:)`][] and [`scene(_:continue:)`][].
+
 ### Creating a FlutterAppDelegate subclass
 Creating a subclass of the `FlutterAppDelegate` in UIKit apps was shown
 in the [Start a FlutterEngine and FlutterViewController section][].
@@ -399,6 +426,19 @@ class AppDelegate: FlutterAppDelegate {
       GeneratedPluginRegistrant.register(with: self.flutterEngine);
       return true;
     }
+
+  override func application(
+    _ application: UIApplication,
+    configurationForConnecting connectingSceneSession: UISceneSession,
+    options: UIScene.ConnectionOptions
+  ) -> UISceneConfiguration {
+    let configuration = UISceneConfiguration(
+      name: nil,
+      sessionRole: connectingSceneSession.role
+    )
+    configuration.delegateClass = FlutterSceneDelegate.self
+    return configuration
+  }
 }
 
 @main
@@ -841,6 +881,8 @@ For a working example, refer to this [sample project][].
 [`runApp`]: {{site.api}}/flutter/widgets/runApp.html
 [`runWithEntrypoint`]: {{site.api}}/ios-embedder/interface_flutter_engine.html#a019d6b3037eff6cfd584fb2eb8e9035e
 [`SystemNavigator.pop()`]: {{site.api}}/flutter/services/SystemNavigator/pop.html
+[`scene(_:openURLContexts:)`]: {{site.apple-dev}}/documentation/uikit/uiscenedelegate/scene(_:openurlcontexts:)
+[`scene(_:continue:)`]: {{site.apple-dev}}/documentation/uikit/uiscenedelegate/scene(_:continue:)
 [tree-shaken]: https://en.wikipedia.org/wiki/Tree_shaking
 [`WidgetsApp`]: {{site.api}}/flutter/widgets/WidgetsApp-class.html
 [`PlatformDispatcher.defaultRouteName`]: {{site.api}}/flutter/dart-ui/PlatformDispatcher/defaultRouteName.html

sites/docs/src/content/platform-integration/ios/platform-views.md

@@ -163,7 +163,7 @@ Finally, register the platform view.
 This can be done in an app or a plugin.
 
 For app registration,
-modify the App's `AppDelegate.swift`:
+implement the `didInitializeImplicitFlutterEngine:` method in the App's `AppDelegate.swift`:
 
 ```swift
 import Flutter
@@ -286,13 +286,16 @@ Finally, register the platform view.
 This can be done in an app or a plugin.
 
 For app registration,
-modify the App's `AppDelegate.m`:
+implement the `didInitializeImplicitFlutterEngine:` method in the App's `AppDelegate.m`:
 
 ```objc
 #import "AppDelegate.h"
 #import "FLNativeView.h"
 #import "GeneratedPluginRegistrant.h"
 
+@interface AppDelegate () <FlutterImplicitEngineDelegate>
+@end
+
 @implementation AppDelegate
 
 - (void)didInitializeImplicitFlutterEngine:(NSObject<FlutterImplicitEngineBridge>*)engineBridge {

sites/docs/src/content/platform-integration/platform-channels.md

@@ -608,7 +608,7 @@ Add support for Swift in the standard template setup that uses Objective-C:
 1. Open the file `AppDelegate.swift` located under **Runner > Runner**
    in the Project navigator.
 
-Override the `application:didFinishLaunchingWithOptions:` function and create
+Implement the `didInitializeImplicitFlutterEngine:` method and create
 a `FlutterMethodChannel` tied to the channel name
 `samples.flutter.dev/battery`:
 
@@ -696,8 +696,8 @@ Start by opening the iOS host portion of the Flutter app in Xcode:
 1. Open the file `AppDelegate.m`, located under **Runner > Runner**
    in the Project navigator.
 
-Create a `FlutterMethodChannel` and add a handler inside the `application
-didFinishLaunchingWithOptions:` method.
+Create a `FlutterMethodChannel` and add a handler inside the
+`didInitializeImplicitFlutterEngine:` method.
 Make sure to use the same channel name
 as was used on the Flutter client side.
 
@@ -712,6 +712,9 @@ create your `FlutterMethodChannel` in the `didInitializeImplicitFlutterEngine` m
 #import <Flutter/Flutter.h>
 #import "GeneratedPluginRegistrant.h"
 
+@interface AppDelegate () <FlutterImplicitEngineDelegate>
+@end
+
 @implementation AppDelegate
 
 - (void)didInitializeImplicitFlutterEngine:(NSObject<FlutterImplicitEngineBridge>*)engineBridge {