iOS headphone plug-in pull-out detection

[Avaudiosession sharedinstance];
[[Nsnotificationcenter Defaultcenter] addobserver:self selector: @selector (audioroutechangelistenercallback:)
Name:avaudiosessionroutechangenotification
Object:nil];

-(void) Audioroutechangelistenercallback: (nsnotification*) notification
{
Nsdictionary *interuptiondict = Notification.userinfo;

Nsinteger Routechangereason = [[Interuptiondict Valueforkey:avaudiosessionroutechangereasonkey] integerValue];

Switch (Routechangereason) {

Case Avaudiosessionroutechangereasonnewdeviceavailable:
NSLog (@ "avaudiosessionroutechangereasonnewdeviceavailable");
NSLog (@ "Headphone/line plugged in");
Break

Case Avaudiosessionroutechangereasonolddeviceunavailable:
NSLog (@ "avaudiosessionroutechangereasonolddeviceunavailable");
NSLog (@ "Headphone/line was pulled. Stopping player .... ");
Break

Case Avaudiosessionroutechangereasoncategorychange:
Called at Start-also if other audio wants to play
NSLog (@ "Avaudiosessionroutechangereasoncategorychange");
Break
}
}

iOS headphone plug-in pull-out detection