Push notification not recieved on first launch

Question

I am using the sinch SDK on a project. The push notification with type voip are not recieved on the first launchs, but recieved after many kill/open application. this is the initialisation of the client

func initSinchClient(userIdentifier : String!) -> SINClient! {


    if let _ = self.sinchClient{
        self.sinchClient?.unregisterPushNotificationDeviceToken()
        self.sinchClient?.stopListeningOnActiveConnection()
        self.sinchClient?.terminate()
    }

    self.sinchClient = Sinch.client(withApplicationKey: SinchConstants.SinchAppKey, applicationSecret: SinchConstants.SinchApplicationSecret, environmentHost: SinchConstants.SinchEnvironmentHost, userId: userIdentifier)
    self.sinchClient!.delegate = self
    self.sinchClient!.call().delegate = self

    self.sinchClient!.setSupportActiveConnectionInBackground(true)
    self.sinchClient!.setSupportPushNotifications(true)
    self.sinchClient!.setSupportCalling(true)
    self.sinchClient?.enableManagedPushNotifications()
    self.sinchClient!.start()
    self.sinchClient!.startListeningOnActiveConnection()

    if let pushTokenData = UserDefaults.standard.object(forKey: "PushNotificationToken"){
        self.sinchClient!.registerPushNotificationData((pushTokenData as! NSData) as Data!)
    }
    return sinchClient
}

This is when i set the token

func pushRegistry(registry: PKPushRegistry!, didUpdatePushCredentials credentials: PKPushCredentials!, forType type: String!) {
    // Register VoIP push token (a property of PKPushCredentials) with server

    if let sinchCLient = SinchManager.sharedInstance.sinchClient{
        if let _ = SessionManager.sharedInstance.user {
            sinchCLient.registerPushNotificationData(credentials.token)

        }

    }

}

how can i resolve this

Answer 1

i solved the problem by moving the registration of VOIP push

let mainQueue = dispatch_get_main_queue()
    // Create a push registry object
    let voipRegistry: PKPushRegistry = PKPushRegistry(queue: mainQueue)
    // Set the registry's delegate to self
    voipRegistry.delegate = self
    // Set the push type to VoIP
    voipRegistry.desiredPushTypes = [PKPushTypeVoIP]

before initializing the push object instantiation and configuration

 self.push = Sinch.managedPushWithAPSEnvironment(.Production)
    self.push!.delegate = self
    self.push!.setDesiredPushType(SINPushTypeVoIP)
    self.push!.registerUserNotificationSettings()