Unity 2D标签跟随3D物体移动

using UnityEngine;

public class 2DLabelFollow3DObj: MonoBehaviour{
  public Transform targetObj;
  public GameObject labelObj;
  
  private void Update()
  {
    UpdateLabel(targetObj);
  }
  
  //target 标签跟随的物体
  private void UpdateLabel(Transform target)
  {
    RectTransform labelRt=label.Getcomponent<RectTransform()>;
    Vector3 screenPos=Camera.main.WorldToScreenPoint(target.Position);
    RectTransform rect=GameObject.Find("Canvas").GetComponent<RectTransform>;
    Vector2 outVec;
    if(RectTransformUtility.ScreenPointToLocalPointInRectangle(rect,screenPos,null,out outVec))
      outVec+=new Vector2(0,-GameObject.Find("Canvas").transform.Find("Panel").localPosition.y);
      //Panel为Canvas中标签的父节点
  }
  
  labelRt.anchoredPosition=outVec;

}