《unity手机游戏开发》4.7敌人Object reference not set to an instance of an object

来源：互联网发布：小阴唇肥大知乎编辑：程序博客网时间：2024/05/30 23:03

通过这本书学习unity发现Object reference not set to an instance of an object这个问题
通过谷歌大法了解到是未实例化的问题，仔细检查了代码，发现书籍给的代码中myCurrentPathNode未赋值
所以在enemy.cs中加了如下代码

private void Awake()    {        myCurrentPathNode = GameObject.FindGameObjectWithTag("pathnode").GetComponent<PathNode>();    }

这是修正后enemy.cs的完整代码

using System.Collections;using System.Collections.Generic;using UnityEngine;public class enemy : MonoBehaviour {    public PathNode myCurrentPathNode;    public int myLife = 15;//生命    public int maxMyLife = 15;    public float myspeed = 2;    //敌人的类型    public enum TYPE_ID    {        GRCUND,        AIR,    }    public TYPE_ID myType = TYPE_ID.GRCUND;    private void Awake()//这个是关键    {        myCurrentPathNode = GameObject.FindGameObjectWithTag("pathnode").GetComponent<PathNode>();    }    private void Update()    {        RotateTo();        MoveTo();    }    //转向下一个路点    public void RotateTo()    {        float current = transform.eulerAngles.y;        transform.LookAt(myCurrentPathNode.transform);        Vector3 target = transform.eulerAngles;        float next = Mathf.MoveTowardsAngle(current, target.y, 120 * Time.deltaTime);        transform.eulerAngles =new Vector3(0, next, 0);    }    //向下一个路口移动    public void MoveTo()    {        Vector3 thisPosition =  transform.position; ;        Vector3 currentPathNodePosition = myCurrentPathNode.transform.position;        //距离子路点的距离        float distance = Vector3.Distance(new Vector2(thisPosition.x, thisPosition.z), new Vector2(currentPathNodePosition.x, currentPathNodePosition.z));        if(distance<1.0)        {            if(myCurrentPathNode.childPathNode==null)            {                GameManager.instance.setDamage(1);                Destroy(this.gameObject);            }            else            {                myCurrentPathNode = myCurrentPathNode.childPathNode;            }        }        transform.Translate(new Vector3(0, 0, myspeed * Time.deltaTime));    }}

阅读全文

1 0