Firebase云消息iOS:无后台推送通知

Question

使用更新的Firebase cloud messaging和swizzling方法，当我的应用程序前景化时，我能够成功地在我的应用程序委托中的didReceiveMemotentification方法中接收有效负载。但是，我没有收到任何类型的有效负载，并且当我的应用程序处于后台时，didReceiveMemoteNotification不会被调用，尽管api响应消息已成功发送（见下文）
以下是我发送给FCM api的请求，以触发推送通知https://fcm.googleapis.com/fcm/send

{
"to": "{valid-registration-token}",
"priority":"high", //others suggested setting priority to high would fix, but did not
  "notification":{
      "body":"Body3",
      "title":"test"  
 } 
}

有FCM的回复

{
      "multicast_id": 6616533575211076304,
      "success": 1,
      "failure": 0,
      "canonical_ids": 0,
      "results": [
        {
          "message_id": "0:1468906545447775%a4aa0efda4aa0efd"
        }
      ]
    }

这是我的appDelegate代码

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

        Fabric.with([Crashlytics.self])
        FIRApp.configure()

        NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(self.tokenRefreshNotification),
                                                         name: kFIRInstanceIDTokenRefreshNotification, object: nil)
        return true
    }



    func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject], fetchCompletionHandler completionHandler: (UIBackgroundFetchResult) -> Void) {
        // Let FCM know about the message for analytics etc.
        FIRMessaging.messaging().appDidReceiveMessage(userInfo)

        // Print full message.
        print("%@", userInfo)

        // handle your message

//        let localNotification = UILocalNotification()
//        localNotification.fireDate = NSDate()
//        let notification = userInfo["notification"]!
//        localNotification.alertBody = notification["body"] as? String
//        localNotification.alertTitle = notification["title"] as? String
//        localNotification.timeZone = NSTimeZone()
//        application.scheduleLocalNotification(localNotification)

    }

    func tokenRefreshNotification(notification: NSNotification) {
        let refreshedToken = FIRInstanceID.instanceID().token()!
        print("InstanceID token: \(refreshedToken)")
        LoginVC.registerForPushNotifications()
        connectToFcm()
    }


    //foreground messages
    func applicationDidBecomeActive(application: UIApplication) {
        connectToFcm()
    }

    // [START disconnect_from_fcm]
    func applicationDidEnterBackground(application: UIApplication) {
        FIRMessaging.messaging().disconnect()
        print("Disconnected from FCM.")
    }


    func connectToFcm() {
        FIRMessaging.messaging().connectWithCompletion { (error) in
            if (error != nil) {
                print("Unable to connect with FCM. \(error)")
            } else {
                print("Connected to FCM.")
            }
        }
    }

}

我在我的应用程序中稍后的流程中调用此代码以请求权限

static func registerForPushNotifications() {
    let settings: UIUserNotificationSettings =
                UIUserNotificationSettings(forTypes: [.Alert, .Badge, .Sound], categories: nil)
            UIApplication.sharedApplication().registerUserNotificationSettings(settings)
            UIApplication.sharedApplication().registerForRemoteNotifications()
}

由于我能够接收通知，而应用程序是前台，我想这将减轻所有的担忧，我的apns证书没有上传或注册令牌是不正确的。如果不是这样，请评论，我会再去那个兔子洞。可能有一些简单的东西，我忽略了，但我如何让通知出现，而应用程序是背景？谢啦

Answer 1

显然，（尽管使用了应该自动执行的方法swizzling）您仍然必须在Firebase实例上设置APNS令牌。因此，这意味着您还必须使用以下方法实现didCORsterForRemteNOtificationsAnd DeviceToken方法

func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {


        // set firebase apns token
        FIRInstanceID.instanceID().setAPNSToken(deviceToken, type: FIRInstanceIDAPNSTokenType.Unknown)
}

作为补充说明。使用“优先级”：“高”对于测试非常有用，因为它会立即发送通知。