Unity3D iOS device token is always null - ios

Question

I am trying to get push notifications to work on iOS, but I can not get access to the device token!
My Unity version is 5.4.1f1.
I have enabled the Push Notifications capability in XCode and all the certificates are setup correctly:
In my script in the start method I call this:
UnityEngine.iOS.NotificationServices.RegisterForNotifications
(UnityEngine.iOS.NotificationType.Alert | UnityEngine.iOS.NotificationType.Badge
| UnityEngine.iOS.NotificationType.Sound, true);
Then from the update method I call this method:
private bool RegisterTokenWithPlayfab( System.Action successCallback,
System.Action<PlayFabError> errorCallback )
{
byte[] token = UnityEngine.iOS.NotificationServices.deviceToken;
if(token != null)
{
// Registration on backend
}
else
{
string errorDescription = UnityEngine.iOS.NotificationServices.registrationError;
Debug.Log( "Push Notifications Registration failed with: " + errorDescription );
return false;
}
}
The token keeps being empty, so the else-branch is entered every call. Also, the registrationError keeps being empty.
Can someone point me in the right direction on this? What else can I try or how can I get more infos on what is going wrong??

Answer 1

Try this one
Go to your application target. Choose Capabilities and ensure that ‘Push Notifications’ is enabled there.

Answer 2

You need to check deviceToken in a Coroutine or Update.
using UnityEngine;
using UnityEngine.Networking;
using System.Collections;
using NotificationServices = UnityEngine.iOS.NotificationServices;
using NotificationType = UnityEngine.iOS.NotificationType;
public class NotificationRegistrationExample : MonoBehaviour
{
bool tokenSent;
void Start()
{
tokenSent = false;
NotificationServices.RegisterForNotifications(
NotificationType.Alert |
NotificationType.Badge |
NotificationType.Sound, true);
}
void Update()
{
if (!tokenSent)
{
byte[] token = NotificationServices.deviceToken;
if (token != null)
{
// send token to a provider
string token = System.BitConverter.ToString(token).Replace('-', '%');
Debug.Log(token)
tokenSent = true;
}
}
}
}
The implementation is horrible, but we don't have callbacks from Unity side so we need to keep listening that variable value.
Check the documentation:
https://docs.unity3d.com/ScriptReference/iOS.NotificationServices.RegisterForNotifications.html
Also seems to need internet. I guess there is an Apple service going on there.
Yes, registration error is empty even when user deniy permissions.
What i did is to use UniRX and set an Observable fron a Coroutine with a time out so it dont keep forever asking for it.
If you accepted and you do not received the token might be the internet conection. And i guess you are teying this on a real device.