当应用程序被终止/关闭时，FireBase PushNotification无法保存数据

Question

我正在使用Firebase（FCM）并尝试在Realm中保存数据。大多数应用程序都喜欢whatsaap / fb messager，即使这些应用程序已被杀死，但如果您不执行任何操作，仍可以接收通知数据。

当应用程序被杀死/关闭时，FireBase PushNotification我什么也不做（离开它）然后就无法保存数据。但是当我点击通知然后就可以保存数据了。 其他都进展顺利。

这是我的appdelegate来源

class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?
let gcmMessageIDKey = "gcm.message_id"

let realm = try! Realm()
let realmData: RealmData = RealmData()

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

    FirebaseApp.configure()

    Messaging.messaging().delegate = self

    if #available(iOS 10.0, *) {
        // For iOS 10 display notification (sent via APNS)
        UNUserNotificationCenter.current().delegate = self

        let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
        UNUserNotificationCenter.current().requestAuthorization(
            options: authOptions,
            completionHandler: {_, _ in })
    } else {
        let settings: UIUserNotificationSettings =
            UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
        application.registerUserNotificationSettings(settings)
    }

    application.registerForRemoteNotifications()

    // [END register_for_notifications]

    if let userInfo = launchOptions?[UIApplication.LaunchOptionsKey.remoteNotification] {
    }

    return true
}

func applicationWillResignActive(_ application: UIApplication) {
}

func applicationDidEnterBackground(_ application: UIApplication) {
    print("enterbackground")
}

func applicationWillEnterForeground(_ application: UIApplication) {
    print("willenterbackground")
}

func applicationDidBecomeActive(_ application: UIApplication) {
    print("restart")
}

func applicationWillTerminate(_ application: UIApplication) {
    print("terminated")
}

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any])-> Void {
    print("receive message")
}

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

    if let messageID = userInfo[gcmMessageIDKey] {
        print("Message ID: \(messageID)")
    }
    print(userInfo)
    guard
        let aps = userInfo[AnyHashable("aps")] as? NSDictionary,
        let alert = aps["alert"] as? NSDictionary,
        let body = alert["body"] as? String,
        let title = alert["title"] as? String
        else {
            // handle any error here
            return
    }

    let state = UIApplication.shared.applicationState

    if state == .background {
        print("I'm in the background place")
        realmData.title = title
        realmData.body = body
        try! realm.write {
            realm.add(realmData)
        }

        completionHandler(UIBackgroundFetchResult.newData)
    }
    else if state == .active {
        print("I'm in the active place")
        realmData.title = title
        realmData.body = body
        try! realm.write {
            realm.add(realmData)
        }

        completionHandler(UIBackgroundFetchResult.newData)
    }
    else if state == .inactive{
        print("I'm in the inactive statement")
        realmData.title = title
        realmData.body = body
        try! realm.write {
            realm.add(realmData)
        }

        completionHandler(UIBackgroundFetchResult.newData)
    }
    else{
        print("I'm in the else statement")
        realmData.title = title
        realmData.body = body
        try! realm.write {
            realm.add(realmData)
        }

        completionHandler(UIBackgroundFetchResult.newData)
    }
}

func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
    print("Unable to register for remote notifications: \(error.localizedDescription)")
}

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
     print("APNs token retrieved: \(deviceToken)")
}

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

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

    completionHandler([.badge, .sound, .alert])
}


func userNotificationCenter(_ center: UNUserNotificationCenter,
                            didReceive response: UNNotificationResponse,
                            withCompletionHandler completionHandler: @escaping () -> Void) {
    let userInfo = response.notification.request.content.userInfo
    // Print message ID.
    if let messageID = userInfo[gcmMessageIDKey] {
        print("Message ID: \(messageID)")
    }

    // Print full message.
    print("userInfo: \(userInfo)")
    guard
        let aps = userInfo[AnyHashable("aps")] as? NSDictionary,
        let alert = aps["alert"] as? NSDictionary,
        let body = alert["body"] as? String,
        let title = alert["title"] as? String
        else {
            // handle any error here
            return
    }
    print("Title: \(title) \nBody:\(body)")
    realmData.title = title
    realmData.body = body
    try! realm.write {
        realm.add(realmData)
    }

    completionHandler()
}
}



extension AppDelegate : MessagingDelegate {  
// [START refresh_token]
func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String) {
    print("Firebase registration token: \(fcmToken)")

    let dataDict:[String: String] = ["token": fcmToken]
    NotificationCenter.default.post(name: Notification.Name("FCMToken"), object: nil, userInfo: dataDict)
}

func messaging(_ messaging: Messaging, didReceive remoteMessage: MessagingRemoteMessage) {
    print("Received data message: \(remoteMessage.appData)")
}
}

这是我的json

{
"to": "device_token",
"content_available" : true,
"mutable-content" : true,
"priority" : "high",
"notification": {
"title": "test1",
"body" : "testbody1"    
"badge" : "1",
"sound" : "default",
"forceStart": "1"
},
"data": {
"url": "url"
}
}