如何在app中获取推送通知设置?

I am developing an iphone application which includes and process apple push notification for the custom sound file. When I set notification sound off from the general settings, notification sound is off as i expect, when app is not in running state. But when the app is in running state then i need to handle sound play or stop manually. So how can i fetch the notification sound related settings, whether it seted on or off? I am able to fetch following settings in I am developing an iphone application which inc