#region PRIVATE_METHODS

    protected virtual void OnTrackingFound()
    {
        isShow = true;
        cubeTrans.SetParent(transform);
        cubeTrans.position = Vector3.zero;

    }


    protected virtual void OnTrackingLost()
    {
        if (isShow) {

            cubeTrans.SetParent(targetTrans);
            cubeTrans.position = Vector3.zero;
            isShow = false;
        }
    }

    #endregion // PRIVATE_METHODS

效果更好