iOS: trigger didUpdateDimensions event when resizing without changing traits

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

@@ -50,7 +50,7 @@
                                                          (const facebook::react::ObjCTurboModule::InitParams &)params
  *   - (id<RCTTurboModule>)getModuleInstanceFromClass:(Class)moduleClass
  */
-@interface RCTAppDelegate : UIResponder <UIApplicationDelegate, RCTBridgeDelegate>
+@interface RCTAppDelegate : UIResponder <UIApplicationDelegate, UISceneDelegate, RCTBridgeDelegate>
 
 /// The window object, used to render the UViewControllers
 @property (nonatomic, strong) UIWindow *window;

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

@@ -117,6 +117,7 @@ - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(
   UIViewController *rootViewController = [self createRootViewController];
   [self setRootView:rootView toRootViewController:rootViewController];
   self.window.rootViewController = rootViewController;
+  self.window.windowScene.delegate = self;
   [self.window makeKeyAndVisible];
 
   return YES;
@@ -177,6 +178,13 @@ - (BOOL)runtimeSchedulerEnabled
   return YES;
 }
 
+#pragma mark - UISceneDelegate
+- (void)windowScene:(UIWindowScene *)windowScene didUpdateCoordinateSpace:(id<UICoordinateSpace>)previousCoordinateSpace
+                                                     interfaceOrientation:(UIInterfaceOrientation)previousInterfaceOrientation
+                                                          traitCollection:(UITraitCollection *)previousTraitCollection API_AVAILABLE(ios(13.0)) {
+  [[NSNotificationCenter defaultCenter] postNotificationName:RCTRootViewFrameDidChangeNotification object:self];
+}
+
 #pragma mark - RCTCxxBridgeDelegate
 - (std::unique_ptr<facebook::react::JSExecutorFactory>)jsExecutorFactoryForBridge:(RCTBridge *)bridge
 {

packages/react-native/React/Base/RCTConstants.h

@@ -10,6 +10,8 @@
 RCT_EXTERN NSString *const RCTUserInterfaceStyleDidChangeNotification;
 RCT_EXTERN NSString *const RCTUserInterfaceStyleDidChangeNotificationTraitCollectionKey;
 
+RCT_EXTERN NSString *const RCTRootViewFrameDidChangeNotification;
+
 /**
  * This notification fires when the bridge initializes.
  */

packages/react-native/React/Base/RCTConstants.m

@@ -10,6 +10,8 @@
 NSString *const RCTUserInterfaceStyleDidChangeNotification = @"RCTUserInterfaceStyleDidChangeNotification";
 NSString *const RCTUserInterfaceStyleDidChangeNotificationTraitCollectionKey = @"traitCollection";
 
+NSString *const RCTRootViewFrameDidChangeNotification = @"RCTRootViewFrameDidChangeNotification";
+
 NSString *const RCTJavaScriptDidFailToLoadNotification = @"RCTJavaScriptDidFailToLoadNotification";
 NSString *const RCTJavaScriptDidLoadNotification = @"RCTJavaScriptDidLoadNotification";
 NSString *const RCTJavaScriptWillStartExecutingNotification = @"RCTJavaScriptWillStartExecutingNotification";

packages/react-native/React/CoreModules/RCTDeviceInfo.mm

@@ -70,6 +70,11 @@ - (void)initialize
                                            selector:@selector(interfaceFrameDidChange)
                                                name:RCTUserInterfaceStyleDidChangeNotification
                                              object:nil];
+
+  [[NSNotificationCenter defaultCenter] addObserver:self
+                                           selector:@selector(interfaceFrameDidChange)
+                                               name:RCTRootViewFrameDidChangeNotification
+                                             object:nil];
 }
 
 - (void)invalidate