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

public class Enemy : MonoBehaviour
{
    //属性
    public float MoveSpeed = 1;

    private Vector3 BllectEulerAngles;

    private float AttackTimeval = 0;//攻击间隔计时器

    private float MoveTimeVal = 5;//移动间隔计时器

    private float h;

    private float v;
    //引用
    private SpriteRenderer sr;

    public Sprite[] TankSprites;//上右下左

    public GameObject Bllect;//子弹

    public GameObject explasion;//死亡特效

    void Start()
    {
        sr = GetComponent<SpriteRenderer>();
    }


    void Update()
    {
        if (AttackTimeval >= 3)
        {
            EnemyAttack();
        }
        else
        {
            AttackTimeval += Time.deltaTime;
        }


    }

    void FixedUpdate()
    {
        if (MoveTimeVal >= 4)
        {
            EnemyMove();
            MoveTimeVal = 0;
        }
        else
        {
            MoveTimeVal += Time.fixedDeltaTime;
        }
    }
    private void EnemyMove()
    {
        int num = Random.Range(0, 8);
        if (num >= 5)//下
        {
            h = 0;
            v = -1;
        }
        else if (num == 0)//上
        {
            h = 0;
            v = 1;
        }
        else if (num > 0 && num <= 2)//左
        {
            h = -1;
            v = 0;
        }
        else if (num > 2 && num <= 4)//右
        {
            h = 1;
            v = 0;
        }
        if (h != 0)//设置优先级
        {
            v = 0;
        }
        //移动
        transform.Translate(Vector3.right * h * MoveSpeed*Time.fixedDeltaTime ,Space.World);
        //变换图片
        if (h < 0)//左
        {
            sr.sprite = TankSprites[3];
            //设置子弹朝向
            BllectEulerAngles = new Vector3(0, 0, 90);
        }
        else if (h > 0)//右
        {
            sr.sprite = TankSprites[1];
            BllectEulerAngles = new Vector3(0, 0, -90);
        }
        //移动
        transform.Translate(Vector3.up * v * MoveSpeed*Time.fixedDeltaTime ,Space.World);
        //变换图片
        if (v < 0)//下
        {
            sr.sprite = TankSprites[2];
            BllectEulerAngles = new Vector3(0, 0, 180);
        }
        else if (v > 0)//上
        {
            sr.sprite = TankSprites[0];
            BllectEulerAngles = new Vector3(0, 0, 0);
        }
    }

    private void EnemyAttack()
    {

        //实例化子弹  旋转角度：当前坦克角度+子弹应旋转角度
        Instantiate(Bllect, this.transform.position, Quaternion.Euler(transform.eulerAngles + BllectEulerAngles));
        AttackTimeval = 0;

    }

    private void EnemyDie()
    {
        Instantiate(explasion, transform.position, Quaternion.identity);
        Destroy(this.gameObject);
    }

    private void OnCollisionEnter2D(Collision collision)
    {
        if (collision.collider.tag.Equals("Enemy"))
        {
            MoveTimeVal = 4;
        }
    }
}

我按照视频中的来用translate方法控制Enemy移动，却移动的十分缓慢