如何解决转换不存在Unity

Question

Vuforia AR Unity

我获得了此代码，以在下一次点击时在屏幕上显示对象一次，它将同一对象移到屏幕上被点击的位置，而不是每次屏幕上都被创建新的对象。这是代码

using System;
using UnityEngine;
using Vuforia;

public class DeployStageOnce : MonoBehavior
{
   public GameObject AnchorStage;
   private PositionalDeviceTracker _deviceTracker;
   private GameObject _previousAnchor;

public void Start()
{
   if(AnchorStage == null)
   { 
       Debug.Log("AnchorStage Must be specified");
       return;
   }

   AnchorStage.SetActive(false);
}

public void Awake()
{ 
  VuforiaARController.Instance.RegisterVuforiaStartedCallback(OnVuforiaStarted);
}

public void OnDestory()
{
   VuforiaARController.Instance.UnregisterVuforiaStartCallback(OnVuforiaStarted);
}

private void OnVuforiaStart()
{ 
   _deviceTracker = TrackerManager.Instace.GetTracker<PositionDeviceTracker>();
}

public void OnInteractiveHitTest(HitTestResult result)
{
   if(result == null || AnchorStage == null)
   {
       Debug.LogWarning("Hit test is invalid or AnchorStage not set");
       return;
   }

    var anchor = _ deviceTracker.CreatePlaneAnchor(Guid.NewGuid().ToString(), result);

     if(anchor != null)
     { 
        AnchorStage.transform.parent = anchor.transform;
        AnchorStage.transform.localPosition = Vector3.zero;
        AnchorStage.transform.localRotation = Quaternion.identity;
        AnchorStage.SetActive(true);
     }
   if(_previousAnchor != null)
   {
      Destory(_previousAnchor);
   }
   _previousAnchor = anchor;
  }
}

这里是我得到的错误

Answer 1

如前所述，Anchor是Vuforia类型，没有组件，因此它没有Anchor。