报错

NullReferenceException: Object reference not set to an instance of an object
Enemy.Start () (at Assets/Scripts/Enemy/Enemy.cs:55)
 

代码

void Start(){
  //hudtextGo = GameObject.Instantiate (hudtextPrefab, Vector3.zero, Quaternion.identity) as GameObject;
  //hudtextGo.transform.parent = HUDTextParent._instance.gameObject.transform;
  hudtextGo = NGUITools.AddChild(HUDTextParent._instance.gameObject, hudtextPrefab);

  hudtext = hudtextGo.GetComponent<HUDText>();
  followTarget = hudtextGo.GetComponent<UIFollowTarget>();
  followTarget.target = hudtextFollow.transform;
  followTarget.gameCamera = Camera.main;
  print (UICamera.current);
  print (UICamera.currentCamera);
  followTarget.uiCamera = UICamera.current.GetComponent<Camera>();   //55行
 }

unity 4.6  ngui