应用收到通知，但在第一次会话中未调用UIApplicationDelegate方法

Question

My app receives push notifications normally but none of the UIApplicationDelegate methods are called (looking at application(_:didReceiveRemoteNotification:) specifically). This only happens in the first session of the app (the session where user approves push notifications). If I kill the app and run it again, I still receive the notifications but then the delegate methods are called correctly.

How is this possible, has anyone face this problem before? It's a pretty basic implementation of push notifications.

Answer 1

To receive push notifications you have to register your token beforehand. If you are only receiving notifications after the second run I assume that you are sending your token to your service when you close the app or something.

You can use this to check the exact moment in which you are obtaining your notifications token:

func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {
    print("DEVICE TOKEN = \(deviceToken)")
}

Try to get the token and send a push notification manually to that token from your service after you obtain it.