detect “Allow Notifications” is on/off for iOS8

Method enabledRemoteNotificationTypes is deprecated since iOS8.

To check remote notifications status in iOS8 you can call

[[UIApplication sharedApplication] isRegisteredForRemoteNotifications];

it will return NO if user disable notifications in Settings. Documentation on isRegisteredForRemoteNotifications

Or you can retrieve all current notification settings:

[[UIApplication sharedApplication] currentUserNotificationSettings];

Documentation on currentUserNotificationSettings