UIApplication.registerForRemoteNotifications() must be called from main thread only

Question

Xcode 9 (iOS 11) showing me an error/warning while registering for Push (remote) notification.

Here is error message

And here is code, I\'ve tried:<

Answer 1

The error message is pretty clear: dispatch registerForRemoteNotifications to the main thread.

I would use the granted parameter and handle the error accordingly

center.requestAuthorization(options: [.sound, .alert, .badge]) { (granted, error) in
        if granted {
              DispatchQueue.main.async {
                  UIApplication.shared.registerForRemoteNotifications()
              }
        } else {
           print(error!)
           // handle the error
        }
}