Hi,

Please try DefaultTrackableEventHandler.

Thank you.

Vuforia Engine Support

Hello

Same error here.



I should call 2 methods into MyItemClass. 



onTargetFound I should call MyItemClass.playMe()

onTargetLost I should call MyItemClass.resetMe();



I tried to set it up as you can see in the screenshot (attached) but doesn't work.



Could you help me?

Hi,

I've replaced Monobehavior,ITrackableEventHandler with DefaultTrackableEventHandler and it's still not working also it gives me an error in the 

mTrackableBehaviour.RegisterTrackableEventHandler(this) line.

Here's a part of the code, I'm trying to play an audio file when a target is detected.

public class OnDetectPlayAudio : DefaultTrackableEventHandler

{

      private TrackableBehaviour mTrackableBehaviour;

    // Start is called before the first frame update

    void Start()

    {

        mTrackableBehaviour = GetComponent<TrackableBehaviour>();

    if (mTrackableBehaviour) {

      mTrackableBehaviour.RegisterTrackableEventHandler(this);

    }

    }

    public void OnTrackableStateChanged(TrackableBehaviour.Status previousStatus,

    TrackableBehaviour.Status newStatus)

     {

    if (newStatus == TrackableBehaviour.Status.DETECTED ||

        newStatus == TrackableBehaviour.Status.TRACKED ||

        newStatus == TrackableBehaviour.Status.EXTENDED_TRACKED)

    {

        //play audio

        Debug.Log("play");

        mTrackableBehaviour.gameObject.GetComponentInChildren<AudioSource>().Play();

   

    }

    else{

        //stop audio

               

        Debug.Log("stop");   

        mTrackableBehaviour.gameObject.GetComponentInChildren<AudioSource>().Stop();



    }

  }

}

DefaultTrackableEventHandler also uses ITrackableEventHandler which is not found, So problem is same, how to resolve this issue?

Thanks

Have you found a solution for it? I am also having this error and I can't find a solution which fixes it.