feat: Implement UIScene lifecycle for iOS

packages/react-native/Libraries/AppDelegate/RCTAppDelegate.h

@@ -81,6 +81,10 @@ __attribute__((deprecated(
 
 - (RCTRootViewFactory *)rootViewFactory;
 
+- (UISceneConfiguration *)application:(UIApplication *)application
+    configurationForConnectingSceneSession:(UISceneSession *)connectingSceneSession
+                                   options:(UISceneConnectionOptions *)options API_AVAILABLE(ios(13.0));
+
 @end
 
 NS_ASSUME_NONNULL_END

packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm

@@ -87,4 +87,14 @@ - (void)setBridgeAdapter:(RCTSurfacePresenterBridgeAdapter *)bridgeAdapter
   self.reactNativeFactory.rootViewFactory.bridgeAdapter = bridgeAdapter;
 }
 
+- (UISceneConfiguration *)application:(UIApplication *)application
+    configurationForConnectingSceneSession:(UISceneSession *)connectingSceneSession
+                                   options:(UISceneConnectionOptions *)options API_AVAILABLE(ios(13.0))
+{
+  UISceneConfiguration *configuration = [[UISceneConfiguration alloc] initWithName:@"Default Configuration"
+                                                                       sessionRole:connectingSceneSession.role];
+  configuration.delegateClass = NSClassFromString(@"RCTSceneDelegate");
+  return configuration;
+}
+
 @end

packages/react-native/Libraries/AppDelegate/RCTSceneDelegate.h

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <UIKit/UIKit.h>
+
+@class RCTReactNativeFactory;
+
+NS_ASSUME_NONNULL_BEGIN
+
+API_AVAILABLE(ios(13.0))
+@interface RCTSceneDelegate : UIResponder <UIWindowSceneDelegate>
+
+@property (nonatomic, strong) UIWindow *window;
+
+@end
+
+NS_ASSUME_NONNULL_END

packages/react-native/Libraries/AppDelegate/RCTSceneDelegate.mm

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import "RCTSceneDelegate.h"
+#import <UIKit/UIKit.h>
+#import "RCTAppDelegate.h"
+#import "RCTReactNativeFactory.h"
+#import "RCTRootViewFactory.h"
+
+@implementation RCTSceneDelegate
+
+- (void)scene:(UIScene *)scene
+    willConnectToSession:(UISceneSession *)session
+                 options:(UISceneConnectionOptions *)connectionOptions API_AVAILABLE(ios(13.0))
+{
+  if (![scene isKindOfClass:[UIWindowScene class]]) {
+    return;
+  }
+
+  UIWindowScene *windowScene = (UIWindowScene *)scene;
+  self.window = [[UIWindow alloc] initWithWindowScene:windowScene];
+
+  // Get the app delegate to access the React Native factory
+  RCTAppDelegate *appDelegate = (RCTAppDelegate *)[UIApplication sharedApplication].delegate;
+
+  if (appDelegate && [appDelegate respondsToSelector:@selector(rootViewFactory)]) {
+    RCTRootViewFactory *rootViewFactory = appDelegate.rootViewFactory;
+
+    UIView *rootView = [rootViewFactory viewWithModuleName:appDelegate.moduleName
+                                         initialProperties:appDelegate.initialProps
+                                             launchOptions:nil];
+
+    UIViewController *rootViewController = [UIViewController new];
+    rootViewController.view = rootView;
+    self.window.rootViewController = rootViewController;
+  }
+
+  [self.window makeKeyAndVisible];
+}
+
+- (void)sceneDidDisconnect:(UIScene *)scene API_AVAILABLE(ios(13.0))
+{
+  // Scene disconnected
+}
+
+- (void)sceneDidBecomeActive:(UIScene *)scene API_AVAILABLE(ios(13.0))
+{
+  // Scene became active
+}
+
+- (void)sceneWillResignActive:(UIScene *)scene API_AVAILABLE(ios(13.0))
+{
+  // Scene will resign active
+}
+
+- (void)sceneWillEnterForeground:(UIScene *)scene API_AVAILABLE(ios(13.0))
+{
+  // Scene will enter foreground
+}
+
+- (void)sceneDidEnterBackground:(UIScene *)scene API_AVAILABLE(ios(13.0))
+{
+  // Scene entered background
+}
+
+@end

packages/rn-tester/RNTester/Info.plist

@@ -63,5 +63,22 @@
 	</array>
 	<key>UIViewControllerBasedStatusBarAppearance</key>
 	<false/>
+	<key>UIApplicationSceneManifest</key>
+	<dict>
+		<key>UIApplicationSupportsMultipleScenes</key>
+		<false/>
+		<key>UISceneConfigurations</key>
+		<dict>
+			<key>UIWindowSceneSessionRoleApplication</key>
+			<array>
+				<dict>
+					<key>UISceneConfigurationName</key>
+					<string>Default Configuration</string>
+					<key>UISceneDelegateClassName</key>
+					<string>RCTSceneDelegate</string>
+				</dict>
+			</array>
+		</dict>
+	</dict>
 </dict>
 </plist>