在React Native中，setBackgroundMessageHandler在Android上可以正常工作，但在iOS上无法正常工作。

Question

在React Native中，Android可以接收到后台通知，但iOS却无法接收。

index.js

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

在注册组件之前，需要执行此操作，正如某个Github问题中所提到的。

在迁移到React Native Firebase v6之后出现了该问题。

软件包版本：

"@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

我通过 REST API 发送的通知负载如下：

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

我已经使用外部设备进行了测试，在 Xcode 和苹果开发者帐户中启用了所有的后台模式和推送通知。 当前 Xcode 版本为 12.4。 感谢任何帮助，谢谢！

- Rohit Mondal

Answer 1

将apns头中的content-available的值从"true"替换为1：

"content-available":1

- Emad jag