setBackgroundMessageHandler is working on android but not on IOS in react native

Question

Background notifications are received on Android but not on IOS in react native.

index.js

 messaging().setBackgroundMessageHandler(async (message)=>{
  console.log(message)
});

This is called before registering the component as is mentioned in a certain Github issues.

This problem arises after migrating to react native firebase v6.

Package versions:-

"@react-native-firebase/app": "^11.0.0",
"@react-native-firebase/messaging": "^11.0.0"

AppDelegate.m

    #import "AppDelegate.h"

#import <React/RCTBridge.h>
#import <React/RCTBundleURLProvider.h>
#import <React/RCTRootView.h>

#ifdef FB_SONARKIT_ENABLED
#import <FlipperKit/FlipperClient.h>
#import <FlipperKitLayoutPlugin/FlipperKitLayoutPlugin.h>
#import <FlipperKitUserDefaultsPlugin/FKUserDefaultsPlugin.h>
#import <FlipperKitNetworkPlugin/FlipperKitNetworkPlugin.h>
#import <SKIOSNetworkPlugin/SKIOSNetworkAdapter.h>
#import <FlipperKitReactPlugin/FlipperKitReactPlugin.h>
static void InitializeFlipper(UIApplication *application) {
  FlipperClient *client = [FlipperClient sharedClient];
  SKDescriptorMapper *layoutDescriptorMapper = [[SKDescriptorMapper alloc] initWithDefaults];
  [client addPlugin:[[FlipperKitLayoutPlugin alloc] initWithRootNode:application withDescriptorMapper:layoutDescriptorMapper]];
  [client addPlugin:[[FKUserDefaultsPlugin alloc] initWithSuiteName:nil]];
  [client addPlugin:[FlipperKitReactPlugin new]];
  [client addPlugin:[[FlipperKitNetworkPlugin alloc] initWithNetworkAdapter:[SKIOSNetworkAdapter new]]];
  [client start];
}
#endif



#import <GoogleMaps/GoogleMaps.h>

#import <Firebase.h>
#import <React/RCTLinkingManager.h>

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  #ifdef FB_SONARKIT_ENABLED
  InitializeFlipper(application);
  #endif

  [GMSServices provideAPIKey:@"AIzaSyA19U0nRV9PKyWHz-252DKVkShrzooWt5Q"];
  [FIRApp configure];

  
  RCTBridge *bridge = [[RCTBridge alloc] initWithDelegate:self launchOptions:launchOptions];
  RCTRootView *rootView = [[RCTRootView alloc] initWithBridge:bridge
                                                   moduleName:@"Sociana"
                                            initialProperties:nil];

  rootView.backgroundColor = [[UIColor alloc] initWithRed:1.0f green:1.0f blue:1.0f alpha:1];

  self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
  UIViewController *rootViewController = [UIViewController new];
  rootViewController.view = rootView;
  self.window.rootViewController = rootViewController;
  [self.window makeKeyAndVisible];
  
  
  
  return YES;
}

 - (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString *, id> *) options {

   return [RCTLinkingManager application:app openURL:url options:options];
//return [self.authorizationFlowManagerDelegate resumeExternalUserAgentFlowWithURL:url];
 }

- (BOOL)application:(UIApplication *)application continueUserActivity:(nonnull NSUserActivity *)userActivity
 restorationHandler:(nonnull void (^)(NSArray<id<UIUserActivityRestoring>> * _Nullable))restorationHandler
{
 return [RCTLinkingManager application:application
                  continueUserActivity:userActivity
                    restorationHandler:restorationHandler];
}





- (void)application:(UIApplication *)application didReceiveRemoteNotification:(nonnull NSDictionary *)userInfo
                                                       fetchCompletionHandler:(nonnull void (^)(UIBackgroundFetchResult))completionHandler{
}


- (NSURL *)sourceURLForBridge:(RCTBridge *)bridge
{
#if DEBUG
  return [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index" fallbackResource:nil];
#else
  return [[NSBundle mainBundle] URLForResource:@"main" withExtension:@"jsbundle"];
#endif
}

@end

AppDelegate.h

#import <React/RCTBridgeDelegate.h>
#import <UIKit/UIKit.h>
#import "RNAppAuthAuthorizationFlowManager.h"

@interface AppDelegate : UIResponder <UIApplicationDelegate, RCTBridgeDelegate,RNAppAuthAuthorizationFlowManager>

@property (nonatomic, strong) UIWindow *window;
@property(nonatomic, weak)id<RNAppAuthAuthorizationFlowManagerDelegate>authorizationFlowManagerDelegate;

@end

The notification payload that I am sending through the REST API is:-

apns: {
      payload: {
        aps: {
          "content-available": "true"
        }
      },
      headers: {
        "apns-priority": "10",
      }
    }

I have used an external device for testing, enabled all the background modes and push notifications in xcode and also from the apple dev account. Current xcode version is 12.4

Any help will be appreciated. Thank you!

Answer 1

Replace the value of content-available in apns header to be 1 instead of "true":

"content-available":1