Suggestion: add callback method to determine whether to authorize status

[GPX-NSlog]

Steps to reproduce:

1. Open the app for the first time and request notification permission. Click Allow
2. Manually open the system settings page and turn off the App notification permission
3. Open the app again and request notification permission. Calling the request method will still take the request callback scheme

[ivanvorobei]

Got bug. will research it.

[lexuanquynh]

I think you should completion (granted, error) in this code:

public override func request(completion: @escaping () -> Void) {
        let center = UNUserNotificationCenter.current()
        center.requestAuthorization(options:[.badge, .alert, .sound]) { (granted, error) in
            DispatchQueue.main.async {
                completion()
            }
        }
    }

[ivanvorobei]

It's stored by system. can't update it. same troubles with location, system not provide right data always