AVSystemController
+ (id)sharedAVSystemController;
- (void)getActiveCategoryVolume:(float*)outVolume andName:(NSString**)outName;
Returns the volumn and name of the active category. Tells you whether headphones are plugged in.
Notifications
Sends a AVSystemController_HeadphoneJackIsConnectedDidChangeNotification notification when the user plus in or unplugs headphones.
Sends a AVSystemController_SystemVolumeDidChangeNotification notification when the system volume has changed (via up/down buttons, mute switch, or programatically)
Category:PointlessInformation