#import <AVFoundation/AVFoundation.h>                - (BOOL)isHeadsetPluggedIn {            AVAudioSessionRouteDescription* route = [[AVAudioSession sharedInstance] currentRoute];            for (AVAudioSessionPortDescription* desc in [route outputs]) {                if ([[desc portType] isEqualToString:AVAudioSessionPortHeadphones])                    return YES;            }            return NO;        }