Firebase 通知在后台不起作用

Question

我已经使用 CocoPods

在我的 swift 应用程序中设置了 Firebase

这是我的一部分 AppDelegate.swift

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

    if #available(iOS 10.0, *) {
        let authOptions : UNAuthorizationOptions = [.alert, .badge, .sound]
        UNUserNotificationCenter.current().requestAuthorization(
            options: authOptions,
            completionHandler: {_,_ in })

        // For iOS 10 display notification (sent via APNS)
        UNUserNotificationCenter.current().delegate = self
        // For iOS 10 data message (sent via FCM)
        FIRMessaging.messaging().remoteMessageDelegate = self

    }
    application.registerForRemoteNotifications()

    FIRApp.configure()


    // Add observer for InstanceID token refresh callback.
    if #available(iOS 10, *) {
        NotificationCenter.default.addObserver(self,
                                               selector: #selector(self.tokenRefreshNotification),
                                               name: .firInstanceIDTokenRefresh,
                                               object: nil)
    } else {
        // Fallback on earlier versions
    }
    return true
}

      func applicationDidEnterBackground(_ application: UIApplication) {
            // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
            // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
            FIRMessaging.messaging().disconnect()
        }

func applicationWillEnterForeground(_ application: UIApplication) {
        // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
    }

    func applicationDidBecomeActive(_ application: UIApplication) {
        // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.

        UIApplication.shared.applicationIconBadgeNumber = 0
        if #available(iOS 10, *) {
            connectToFcm()
        } else {
            // Fallback on earlier versions
        }
    }

    func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any]) {
        if let messageID = userInfo[gcmMessageIDKey] {
            print("Message ID: \(messageID)")
        }
        // Print full message.
        print(userInfo)
    }


    func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
        completionHandler(UIBackgroundFetchResult.newData)

        if let messageID = userInfo[gcmMessageIDKey] {
            print("Message ID: \(messageID)")
        }

        // Print full message.
        print(userInfo)
    }

}

@available(iOS 10, *)
extension AppDelegate : UNUserNotificationCenterDelegate {

    // Receive displayed notifications for iOS 10 devices.

    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        let userInfo = notification.request.content.userInfo
        // Print message ID.
//        print("Message ID: \(userInfo["gcm.message_id"]!)")

        // Print full message.
        print("userNotificationCenter:User Info = ", userInfo)

    }

    // [START refresh_token]
    func tokenRefreshNotification(_ notification: Notification) {
        if let refreshedToken = FIRInstanceID.instanceID().token() {
            print("InstanceID token: \(refreshedToken)")
        }

        // Connect to FCM since connection may have failed when attempted before having a token.
        connectToFcm()
    }
    // [END refresh_token]
    // [START connect_to_fcm]
    func connectToFcm() {
        // Won't connect since there is no token
        guard FIRInstanceID.instanceID().token() != nil else {
            return;
        }

        // Disconnect previous FCM connection if it exists.
        FIRMessaging.messaging().disconnect()

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

}

extension AppDelegate : FIRMessagingDelegate {
    // Receive data message on iOS 10 devices.
    func applicationReceivedRemoteMessage(_ remoteMessage: FIRMessagingRemoteMessage) {
        print("FIRMessagingDelegate:applicationReceivedRemoteMessage", remoteMessage.appData)
    }
}

当我从 Firebase 控制台发送通知时，我在 applicationReceivedRemoteMessage

中打印时接收并显示在日志中的当前状态

我想咨询的问题：

应用程序未在通知栏中显示通知。
应用程序应该在前台，如果它在后台或强制关闭日志什么都不显示，当然也没有通知。那么我可以在后台接收吗？

Answer 1

缺少的部分是添加 Add FirebaseAppDelegateProxyEnabled type "Boolean" value "NO" in your info.plist

我的参考是

Firebase 通知在后台不起作用

Firebase Notification doesn't work in background

push-notification

apple-push-notifications

ios

firebase

swift