prevent from publishing dimensions change event when app changes state

React/Base/RCTUtils.h

@@ -186,4 +186,6 @@ RCT_EXTERN BOOL RCTValidateTypeOfViewCommandArgument(
     NSString const *commandName,
     NSString const *argPos);
 
+RCT_EXTERN BOOL RCTIsAppActive(void);
+
 NS_ASSUME_NONNULL_END

React/Base/RCTUtils.m

@@ -1067,3 +1067,8 @@ RCT_EXTERN BOOL RCTValidateTypeOfViewCommandArgument(
 
   return true;
 }
+
+BOOL RCTIsAppActive(void)
+{
+  return [RCTSharedApplication() applicationState] == UIApplicationStateActive;
+}

React/CoreModules/RCTDeviceInfo.mm

@@ -174,12 +174,15 @@ - (void)interfaceOrientationDidChange
 
 - (void)_interfaceOrientationDidChange
 {
-  UIInterfaceOrientation nextOrientation = [RCTSharedApplication() statusBarOrientation];
-  UIApplicationState appState = [RCTSharedApplication() applicationState];
-  BOOL isRunningInFullScreen = CGRectEqualToRect([UIApplication sharedApplication].delegate.window.frame, [UIApplication sharedApplication].delegate.window.screen.bounds);
-
+  UIApplication *application = RCTSharedApplication();
+  if(!application) {
+    return;
+  }
+  UIInterfaceOrientation nextOrientation = [application statusBarOrientation];
 
-  BOOL isActive = appState == UIApplicationStateActive;
+  BOOL isRunningInFullScreen = CGRectEqualToRect(application.delegate.window.frame, application.delegate.window.screen.bounds);
+
+  BOOL isActive = RCTIsAppActive();
   // We are catching here two situations for multitasking view:
   // a) The app is in Split View and the container gets resized -> !isRunningInFullScreen
   // b) The app changes to/from fullscreen example: App runs in slide over mode and goes into fullscreen-> isRunningInFullScreen != _isFullscreen
@@ -192,15 +195,15 @@ - (void)_interfaceOrientationDidChange
   // Update when we go from portrait to landscape, or landscape to portrait
   // Also update when the fullscreen state changes (multitasking) and only when the app is in active state.
   if ((isOrientationChanging || isResizingOrChangingToFullscreen) && isActive) {
-      #pragma clang diagnostic push
-      #pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
           [[_moduleRegistry moduleForName:"EventDispatcher"] sendDeviceEventWithName:@"didUpdateDimensions"
                                                                                 body:RCTExportedDimensions(_moduleRegistry, _bridge)];
-            // We only want to track the current _currentInterfaceOrientation and _isFullscreen only 
+            // We only want to track the current _currentInterfaceOrientation and _isFullscreen only
             // when it happens and only when it is published.
             _currentInterfaceOrientation = nextOrientation;
             _isFullscreen = isRunningInFullScreen;
-      #pragma clang diagnostic pop
+#pragma clang diagnostic pop
   }
 
 
@@ -216,20 +219,23 @@ - (void)interfaceFrameDidChange
 
 - (void)_interfaceFrameDidChange
 {
+  UIApplication *application = RCTSharedApplication();
+  if(!application){
+    return;
+  }
   NSDictionary *nextInterfaceDimensions = RCTExportedDimensions(_moduleRegistry, _bridge);
-  UIApplicationState appState = [RCTSharedApplication() applicationState];
 
-  BOOL isActive = appState == UIApplicationStateActive;
+  BOOL isActive = RCTIsAppActive();
   // update and publish the even only when the app is in active state
   if (!([nextInterfaceDimensions isEqual:_currentInterfaceDimensions]) && isActive) {
-    #pragma clang diagnostic push
-    #pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
         [[_moduleRegistry moduleForName:"EventDispatcher"] sendDeviceEventWithName:@"didUpdateDimensions"
                                                                               body:nextInterfaceDimensions];
-          // We only want to track the current _currentInterfaceOrientation only 
+          // We only want to track the current _currentInterfaceOrientation only
           // when it happens and only when it is published.
           _currentInterfaceDimensions = nextInterfaceDimensions;
-    #pragma clang diagnostic pop
+#pragma clang diagnostic pop
   }
 }