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c# - NullReferenceException '对象引用未设置为对象的实例' unity 2D

问题描述

我NullReferenceException在这条线上得到一个：

animator.transform.position = Vector2.MoveTowards(animator.transform.position, patrolPoints[randomPoint].transform.position, speed * Time.deltaTime);

我怎样才能解决这个问题？

这是我的代码：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PatrolBehaviour : StateMachineBehaviour
{
    private GameObject[] patrolPoints;

    public float speed;

    int randomPoint;

    override public void OnStateEnter(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
    {
        patrolPoints = GameObject.FindGameObjectsWithTag("patrolPoints");
        randomPoint = Random.Range(0, patrolPoints.Length);
    }

    override public void OnStateUpdate(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
    {
       animator.transform.position = Vector2.MoveTowards(animator.transform.position, patrolPoints[randomPoint].transform.position, speed * Time.deltaTime);

        if (Vector2.Distance(animator.transform.position, patrolPoints[randomPoint].transform.position) < 0.1f)
        {
            randomPoint = Random.Range(0, patrolPoints.Length);
        }
    }

    override public void OnStateExit(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
    {

    }

}

标签： c#unity3d

解决方案

那么错误“对象引用未设置为对象的实例”意味着您正在尝试访问当前为空的内容。要尝试解决此问题，请首先确保所有变量都已设置值且不为空。

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