Firebase 通知（仅数据）未在前台接收

Question

大家好，我读到了人们在使用 Firebase 和 iOS 通知时遇到的一些问题，但似乎有人遇到了同样的问题。

现在我正在谈论FOREGROUND应用程序状态：

应用程序收到通知，例如这样的参数通知：

let notificationsParameters:[String:AnyObject] = [
        "to": "iphoneID",
        "content-available":true,
        "priority":"high",
// "notification" : [
//                "body" : "great match!",
//                "title" : "Portugal vs. Denmark",
//                "icon" : "myicon"
//            ],
        "data" : [
            "Nick" : "Mario",
            "Room" : "PortugalVSDenmark"
        ]
    ]

但是一旦我删除了通知部分，应用程序就什么也没有收到，即使保持在前台，我看到每个人都应该收到通知。

我为接收甚至关闭/背景和内容可用添加了高优先级，我阅读的内容应该可以解决我的问题，但事实并非如此。

在这里你有涉及的代码：

应用程序委托

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // Override point for customization after application launch.



        GMSServices.provideAPIKey(Constants.GoogleMaps.APIKey)
        FIRApp.configure()


        /* NOTFICATIONS */

        let notificationsType:UIUserNotificationType = [UIUserNotificationType.Alert, UIUserNotificationType.Badge, UIUserNotificationType.Sound]
        let notificationSettings = UIUserNotificationSettings(forTypes: notificationsType, categories: nil)
        application.registerForRemoteNotifications()
        application.registerUserNotificationSettings(notificationSettings)

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


        return true
    }

通知（在应用程序委托中）

据我了解，这就是我将收到通知数据的假设

func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject],
                     fetchCompletionHandler completionHandler: (UIBackgroundFetchResult) -> Void) {
        // If you are receiving a notification message while your app is in the background,
        // this callback will not be fired till the user taps on the notification launching the application.
        // TODO: Handle data of notification

        // Print message ID.
        print("Message ID: \(userInfo["gcm.message_id"]!)")

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

    func tokenRefreshNotification(notification:NSNotification) {
        let refreshedToken = FIRInstanceID.instanceID().token()
        print("InstanceID token: \(refreshedToken)")

        connectToFCM()
    }

    func connectToFCM() {
        FIRMessaging.messaging().connectWithCompletion { (error) in
            if error != nil {
                print("GMS ERROR: \(error)")
            }
            else {
                print("Connected to GMS")
            }
        }
    }

调用 Firebase 通知

func sendNotification() {

        let notificationsParameters:[String:AnyObject] = [
            "to": "iphoneID",
            "content-available":true,
            "priority":"high",
            //            "notification" : [
            //                "body" : "great match!",
            //                "title" : "Portugal vs. Denmark",
            //                "icon" : "myicon"
            //            ],
            "data" : [
                "Nick" : "Mario",
                "Room" : "PortugalVSDenmark"
            ]
        ]


        let URL = NSURL(string: "https://fcm.googleapis.com/fcm/send")!
        let URLRequest = NSMutableURLRequest(URL: URL)

        URLRequest.HTTPMethod = "POST"

        URLRequest.setValue("key=\(Constants.Firebase.NotificationsKey)", forHTTPHeaderField: "Authorization")
        URLRequest.setValue("application/json", forHTTPHeaderField: "Content-Type")

        let encoding = Alamofire.ParameterEncoding.JSON

        let encoded = encoding.encode(URLRequest, parameters: (notificationsParameters)).0
        Alamofire.request(encoded)
    }

您需要任何进一步的信息，请告诉我！

Answer 1

您的方向是正确的，但content_available参数中需要下划线而不是连字符。notification如果您希望使用 FCM 获得仅数据（静默）通知，则无需使用该对象。

例如，在您的 FCM 发送请求正文中：

{
    "to": "iPhoneID",
    "content_available": true,
    "priority": "high",
    "data": {
        "nick": "mario",
        "room": "PortugalVSDenmark"
    }
}

Answer 2

对于那些和我有同样问题的人，一种解决方案是设置通知参数，如下所示：

let notificationsParameters:[String:AnyObject] = [
            "to": "iphoneID",
            "content-available":true,
            "priority":"high",
           "notification" : [
               "sound" : " "
           ],
            "data" : [
                "Nick" : "Mario",
                "Room" : "PortugalVSDenmark"
            ]
        ]

当应用程序被杀死时，您不会收到通知，但在前台和后台时您将只能收到数据通知，祝您好运！