使用QuickBlox sdk Swift进行后台调用

如何解决使用QuickBlox sdk Swift进行后台调用

我需要帮助来为我的应用程序实现后台调用。我已授予vOIP权限并导入了Pushkit并为其编写了委托方法。

这是我的委托方法：

func pushRegistry(_ registry: PKPushRegistry,didUpdate pushCredentials: PKPushCredentials,for type: PKPushType) {
        print("didUpdate pushCredentials")
        guard let voipToken = registry.pushToken(for: .voIP) else {
            print("voip token and push token is nil")
            return
        }
        guard let deviceidentifier = UIDevice.current.identifierForvendor?.uuidString else {
            print("device id nil")
            return
        }
        let subscription = QBMSubscription()
        subscription.notificationChannel = .APNSVOIP
        subscription.deviceUDID = deviceidentifier
        subscription.devicetoken = voipToken
        
        QBRequest.createSubscription(subscription,successBlock: { response,objects in
            print("[WaitingRoomVC] Create Subscription request - Success")
        },errorBlock: { response in
            print("[WaitingRoomVC] Create Subscription request - Error")
        })
    }