unregisterForRemoteNotifications仍然在“设置”中显示“允许通知”

I'm creating a settings page which allows the user to turn push notifications on and off. Here's my question. If the user Allows Push Notifications at the initial system prompt then later changes their mind and turns the UISwitch to No, I have my off switch action to be: [[UIApplication sharedApplication] unregisterForRemoteNotifications];I'm creating a settings page which allows the u