iOS 中的 React Native OneSignal 后台通知問題

Question

我按照本指南在我的本機應用程序中設置 OneSignal 后台通知： https://documentation.onesignal.com/docs/rn-android-native-module-setup-for-notification-service-extension#ios-notification-服務擴展模塊

當我通過 Xcode 將應用程序直接安裝到我的設備時，后台通知按預期工作。但是當我存檔構建並從 TestFlight 安裝時，后台通知不起作用。 除非我添加的emitNotificationEvent事件沒有被觸發，即使收到推送通知也是如此。

當我在 Xcode（使用設備控制台）中跟蹤存檔構建的問題時，注意到NotificationExtensionModule.m中的_instance是 null。 任何人都遇到過類似的問題或知道可能是什么原因？

筆記

• Xcode 版本：13.4
• 在兩種情況下都收到推送通知（來自試飛或直接安裝）
• 將新版本放入 TestFlight，用於增加具有相同版本號的內部版本號。
• 嘗試清理構建文件夾，重新安裝 pod，仍然沒有任何效果

添加代碼片段以進一步了解我的問題：

AppDelegate.h

#import <Foundation/Foundation.h>
#import <React/RCTBridgeDelegate.h>
#import <UIKit/UIKit.h>
#import <UserNotifications/UserNotifications.h>


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

@property (nonatomic, strong) UIWindow *window;

@end

AppDelegate.m

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{
  //access NotificationServiceExtensionModule emitNotificationEvent method
  [NotificationServiceExtensionModule.sharedInstance emitNotificationEvent:userInfo ];
  completionHandler(UIBackgroundFetchResultNoData);
}

NotificationServiceExtensionModule.h

#import <foundation/Foundation.h>

// NotificationServiceExtensionModule.h
#import <React/RCTBridgeModule.h>
#import <React/RCTEventEmitter.h>

@interface NotificationServiceExtensionModule : RCTEventEmitter <RCTBridgeModule>

+ (NotificationServiceExtensionModule*) sharedInstance;
- (void)emitNotificationEvent:(NSDictionary *)userInfo;


@end

NotificationServiceExtensionModule.m

#import <Foundation/Foundation.h>

// NotificationServiceExtensionModule.m
#import "NotificationServiceExtensionModule.h"

@implementation NotificationServiceExtensionModule

static NotificationServiceExtensionModule* _instance = nil;


+(NotificationServiceExtensionModule*) sharedInstance {
//    @synchronized( _instance ) {
//        if( !_instance ) {
//            _instance = [[NotificationServiceExtensionModule alloc] init];
//        }
//    }
    
    return _instance; // this returns null when installed from TestFlight. 
}

// To export a module named NotificationServiceExtensionModule
RCT_EXPORT_MODULE();

- (NSArray<NSString *> *)supportedEvents
{
  NSLog(@"Supported EVENTS__________________________");
  _instance = self;
  return @[@"NotificationEvent"];
}

- (void)emitNotificationEvent:(NSDictionary *)userInfo
{
  NSString *eventName = userInfo[@"custom"][@"a"];
  [self sendEventWithName:@"NotificationEvent" body:@{@"notificationPayload": eventName}];
}

@end

Answer 1

您可以使用以下代碼檢查應用程序是在后台還是前台運行：

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{
  //access NotificationServiceExtensionModule emitNotificationEvent method
  [NotificationServiceExtensionModule.sharedInstance emitNotificationEvent:userInfo ];
  if (application.applicationState == UIApplicationStateActive) {
    // App was in the foreground when the notification was received
  } else {
    // App was in the background when the notification was received
  }
  completionHandler(UIBackgroundFetchResultNoData);
}