Firebase iOS推送通知在首次安装时不起作用

当我第一次安装并打开应用程序并接受苹果的通知权限警报时，我从Firebase获得以下日志：

5.16.0-[Firebase/InstanceID][I-IID023004]无法更新密钥对的属性，以便在首次解锁后可以访问。更新 状况：-25300

之后，如果我关闭或将应用发送到后台，我不会收到任何通知。如果我再次打开应用程序，则通知将开始正常工作

这是我当前的设置：

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
    setupPushNotificationsHandling(application)
    return true
}

private func setupPushNotificationsHandling(_ application: UIApplication) {
    UNUserNotificationCenter.current().delegate = self
    UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound]) { (granted, _) in
        guard granted else { return }

        DispatchQueue.main.async {
            application.registerForRemoteNotifications()

            FirebaseApp.configure()
            InstanceID.instanceID().instanceID { (result, _) in
                // Receive notifications from the "all" topic
                Messaging.messaging().subscribe(toTopic: "all")
            }
        }
    }
}

func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
    print("response \(response)")
    completionHandler()
}

---

我就是这样解决的

在尝试订阅通知主题之前，我会等待调用委托方法

application:didRegisterForRemotionTificationsWithDeviceToken:

我重试，直到调用

InstanceID.InstanceID（）.InstanceID

返回有效的设备令牌

完成设置：

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
    setupPushNotificationsHandling(application)
    return true
}

private func setupPushNotificationsHandling(_ application: UIApplication) {
    FirebaseApp.configure()

    application.registerForRemoteNotifications()

    UNUserNotificationCenter.current().delegate = self
    UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound]) { (_, _) in }
}

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
    // Receive notifications from the "all" topic
    subscribeToNotificationsTopic(topic: "all")
}

func subscribeToNotificationsTopic(topic: String) {
    // Retry until the notifications subscription is successful
    DispatchQueue.global().async {
        var subscribed = false
        while !subscribed {
            let semaphore = DispatchSemaphore(value: 0)

            InstanceID.instanceID().instanceID { (result, error) in
                if let result = result {
                    // Device token can be used to send notifications exclusively to this device
                    print("Device token \(result.token)")

                    // Subscribe
                    Messaging.messaging().subscribe(toTopic: topic)

                    // Notify semaphore
                    subscribed = true
                    semaphore.signal()
                }
            }

            // Set a 3 seconds timeout
            let dispatchTime = DispatchTime.now() + DispatchTimeInterval.seconds(3)
            _ = semaphore.wait(timeout: dispatchTime)
        }
    }
}

---

Firebase.configure（），将其放入应用程序委托中。然后，您可以在RegisterForemotentification发生后获取instanceId。@karthik-谢谢，但我的应用程序委托上已经有了

Firebase.configure（）

，就在我调用

instanceId.instanceId（）.instanceId

之前。我可以看到您正在调用RegisterForemotentification。在注册前进行配置。在注册前进行

configure

调用；同样的问题。我有同样的问题-有解决方案吗？为我工作。。。。。