Check current or previous audio category iOS - ios

Question

I have an application with multiple AudioSession's and their own aduioRouteChangeCallback's. I need a way of seeing what the current or previous Audio Category was in order to display the proper message to the user.
Does anyone know a way this can be done? From what I've seen on the web so far my hopes are not high that this is possible from what I've found on the web. Any help is greatly appreciate because I'm working against a deadline.
Below is an example of one of my audioRouteChangeCallback,
- (void) audioRouteChangeListener: (NSNotification*)notification {
// Initiallize dictionary with notification and grab route change reason
NSDictionary *interuptionDict = notification.userInfo;
NSInteger routeChangeReason = [[interuptionDictvalueForKey:
AVAudioSessionRouteChangeReasonKey] integerValue];
NSLog(#"MADE IT: sensorAudioRouteChageListener");
switch (routeChangeReason) {
// Sensor inserted
case AVAudioSessionRouteChangeReasonNewDeviceAvailable:
// Start IO communication
[self startCollecting];
NSLog(#"Sensor INSERTED");
break;
// Sensor removed
case AVAudioSessionRouteChangeReasonOldDeviceUnavailable:
// Stop IO audio unit
[self stopCollecting];
NSLog(#"Sensor REMOVED");
break;
// Category changed from PlayAndRecord
case AVAudioSessionRouteChangeReasonCategoryChange:
// Stop IO audio unit
[self stopCollecting];
NSLog(#"Category CHANGED");
break;
default:
NSLog(#"Blowing it in- audioRouteChangeListener with route change reason: %ld",
(long)routeChangeReason);
break;
}
}
The session is initialized in the objects init function,
- (id) init {
self = [super init];
if (!self) return nil;
// Set up AVAudioSession
self->noiseAudioSession = [AVAudioSession sharedInstance];
BOOL success;
NSError *error;
success = [self->noiseAudioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:&error];
if (!success) NSLog(#"ERROR initNoiseRecorder: AVAudioSession failed overrideOutputAudio- %#", error);
success = [self->noiseAudioSession setActive:YES error:&error];
if (!success) NSLog(#"ERROR initNoiseRecorder: AVAudioSession failed activating- %#", error);
return self;
}