vuforia 模型目标（ModelTarget）每个场景只能激活一个数据集的解决方法

  public void SwapActiveDatasets(string datasetToActivate)
    {
       
        // 得到目标追踪器
        ObjectTracker objectTracker = TrackerManager.Instance.GetTracker<ObjectTracker>();
        //得到所有的DataSet
        IEnumerable<DataSet> datasets = objectTracker.GetDataSets();
        //得到所有已经激活的Dataset
        IEnumerable<DataSet> activeDataSets = objectTracker.GetActiveDataSets();
        //激活Dataset的List
        List<DataSet> activeDataSetsToBeRemoved = activeDataSets.ToList();
        //关闭追踪器
        objectTracker.Stop();

        // 循环遍历激活数据集并关闭
        foreach (DataSet ads in activeDataSetsToBeRemoved)
        {
            objectTracker.DeactivateDataSet(ads);
        }

        //判断是否存在需要激活的数据集并激活
        foreach (DataSet ds in datasets)
        {
            if (ds.Path.Contains(datasetToActivate))
            {
                objectTracker.ActivateDataSet(ds);
            }
        }

        // 将GuideView设置为2D
        IEnumerable<TrackableBehaviour> tbs = TrackerManager.Instance.GetStateManager().GetTrackableBehaviours();
        foreach (TrackableBehaviour tb in tbs)
        {
            if (tb is ModelTargetBehaviour && tb.isActiveAndEnabled)
            {
                Debug.Log("TrackableName: " + tb.TrackableName);
                (tb as ModelTargetBehaviour).GuideViewMode = ModelTargetBehaviour.GuideViewDisplayMode.GuideView2D;
            }

        }
        // 5. 开启追踪
        objectTracker.Start();
    }  public void SwapActiveDatasets(string d