IOS - delegate method when manually turning on Push Push user in settings

Question

We know that when a user requests a system dialogue in the application with a request for Push Notification permission, if he clicks "YES", then he will be called application:didRegisterForRemoteNotificationsWithDeviceToken:if he clicks "NO", then he application:didFailToRegisterForRemoteNotificationsWithError:will be called.

What should I do if the user clicks “NO” and then goes to “Settings” and manually enables push notifications? Upon returning to the application, a specific delegate method will be launched? I would like to execute a code block as soon as the user turns on push notifications in the settings, what is the best way to detect this without trying to register with applicationDidBecomeActive each time?

Answer 1

If the user rejects your request for notifications, then didFailToRegisterForRemoteNotificationsWithError:it is not called because the registration did not work - he did not even try.

If the user changes the permissions in the settings application, you will receive a call didRegisterForRemoteNotificationsWithDeviceToken:either the next time you start the application, or when your application returns to the foreground, if it is in the background.

, - , didRegisterUserNotificationSettings:, , , , didRegisterForRemoteNotificationsWithDeviceToken:

Answer 2

, push-, .

func application(_ application: UIApplication, didRegister notificationSettings: UIUserNotificationSettings) {
}