Rigidbody2D rbody;//定义2d刚体 Animator anim;//定义动画 Vector2 lookDirection = new Vector2(1, 0);//初始向x看 GameObject robotObj;//定义一个机器人对象 //最大健康值 private int maxHealth=5; //当前健康值 private int currentHealth; //其他脚本可获取最大健康值 public int MyMaxHealth { get { return maxHealth; } } //其他脚本可获取当前健康值 public int MyCurrentHealth { get { return currentHealth; } } //敌人剩余数量 public static int enemyleft = 2; //public int curEnemyleft { get { return enemyleft; } } //无敌时间 private float wuditime = 2f; //无敌计时器 private float wuditimer; //无敌状态 private bool isWudi; //子弹数量 [SerializeField] private int curBulletCount=2; private int maxBulletCount=99; public int MyCurBulletCount { get { return curBulletCount; } } public int MyMaxBulletCount { get { return maxBulletCount; } } //子弹预制体 public GameObject bulletPrefab; //游戏结束提示 public GameObject GameOver; //指定为主角并销毁 public GameObject GameOverPlayer; //任务完成提示 public GameObject MissionCompleted; //无法实现在其他脚本中销毁提示，故在此脚本中限时销毁 public float showTime = 4; private float showTimer; //显示标志，一场游戏中只显示一次 private int showflag=0; //玩家音效 public AudioClip hitClip; public AudioClip launchClip; // Start is called before the first frame update void Start() //隐藏任务完成提示 MissionCompleted.SetActive(false); //提示计时器设置为负值 showTimer = -1; //重新开始游戏后初始化敌人数量 enemyleft = 2; rbody = GetComponent();//获取2d刚体 anim = GetComponent();//获取动画组件 //初始化生命值 currentHealth = 2; //初始化无敌时间 wuditimer = 0; //更新生命条与子弹数量 UIManager.instance.UpdateHealthBar(currentHealth, maxHealth); UIManager.instance.UpdateBulletCount(curBulletCount, maxBulletCount); // Update is called once per frame void Update() //任务完成提示计时 showTimer -= Time.deltaTime; //Debug.Log(showTimer); //超过时间就取消显示任务完成提示 if (showTimer < 0) MissionCompleted.SetActive(false); //敌人数量为0，并且是第一次达到0，之前没有完成任务，任务完成 if (enemyleft==0 && showflag != 1) //给倒计时器赋值，以此显示提示 showTimer = showTime; //已经完成任务了，标记一下，之后不再显示 showflag = 1; //显示任务完成提示 MissionCompleted.SetActive(true); //如果生命值为0，显示游戏结束字样，并销毁主角 if (currentHealth==0) GameOver.SetActive(true); Destroy(GameOverPlayer); //获取运动矢量 float moveX = Input.GetAxisRaw("Horizontal"); float moveY = Input.GetAxisRaw("Vertical"); Vector2 moveVector = new Vector2(moveX, moveY); if(moveX!=0||moveY!=0) lookDirection = moveVector; Vector2 position = transform.position; position.x += moveX * speed * Time.deltaTime; position.y += moveY * speed * Time.deltaTime; transform.position = new Vector2(position.x, position.y); rbody.MovePosition(position);//用刚体移动可以消除画面抖动 anim.SetFloat("move X",lookDirection.x);//为动画集赋值 anim.SetFloat("move Y",lookDirection.y); anim.SetFloat("runspeed", moveVector.magnitude);//状态集的切换由运动矢量决定 //赋值必须与状态集命名一样 //-------------------------------------------------- //如果处于无敌状态，就计时 if(isWudi) wuditimer -= Time.deltaTime; //计时器归0，就不处于无敌状态了 if(wuditimer<0) isWudi = false; //------------------------------------- //当按下J，并且子弹大于0，开火 if(Input.GetKeyDown(KeyCode.J) && curBulletCount>0) ChangeBulletCount(-1); anim.SetTrigger("Launch"); AudioManager.instance.AudioPlay(launchClip); GameObject bullet = Instantiate(bulletPrefab, rbody.position+Vector2.up*0.5f, Quaternion.identity); BulletControl bc = bullet.GetComponent(); if(bc!=null) bc.Shoot(lookDirection, 300); //按E与npc交互 if(Input.GetKeyDown(KeyCode.E)) RaycastHit2D hit = Physics2D.Raycast(rbody.position, lookDirection, 2f, LayerMask.GetMask("NPC")); if(hit.collider!=null) Debug.Log("hit npc!"); NPCManager npc = hit.collider.GetComponent(); if(npc!=null) npc.ShowDialog(); private void OnTriggerEnter2D(Collider2D collision) //踩到雷区，自动生成僵尸 float robotX = Random.Range(-3, 5); float robotY = Random.Range(-3, 5); Vector2 position_robot = new Vector2(robotX, robotY); if(collision.gameObject.tag=="bomb")//如果碰到雷区 print("other.tag=" + collision.gameObject.tag);//这句一定要有，不然出不来 robotObj = Instantiate(Resources.Load("Prefabs/Robot"),position_robot,Quaternion.identity)as GameObject;//加载资源,生成一个预制体，做成一个对象 private void OnTriggerExit2D(Collider2D collision) //离开雷区，僵尸消失 if(collision.gameObject.tag=="bomb") Destroy(robotObj); public void chnageHealth(int amount) //可能是受到伤害，也可能是加血 if(amount<0) //如果是受伤，设置无敌状态，则2秒内不能受伤 if(isWudi==true) return; isWudi = true; //播放受伤动画 anim.SetTrigger("Hit"); //播放受伤音效 AudioManager.instance.AudioPlay(hitClip); //为无敌计时器赋值 wuditimer = wuditime; //更改健康值 currentHealth = Mathf.Clamp(currentHealth+amount,0,maxHealth); //更新血条 UIManager.instance.UpdateHealthBar(currentHealth, maxHealth); Debug.Log(currentHealth + "/" + maxHealth); public void ChangeBulletCount(int amount) //改变子弹数 curBulletCount = Mathf.Clamp(curBulletCount + amount, 0, maxBulletCount); //改变UI子弹数 UIManager.instance.UpdateBulletCount(curBulletCount, maxBulletCount);

减少剩余敌人数，是在子弹脚本中实现的

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class BulletControl : MonoBehaviour
    Rigidbody2D rbody;
    //子弹命中声
    public AudioClip hitClip;
// Start is called before the first frame update
void Awake()
        rbody = GetComponent<Rigidbody2D>();
        //2秒后不管打没打中，子弹销毁子弹
        Destroy(this.gameObject, 2f);
    // Update is called once per frame
    void Update()
    //子弹发射，射击
    public void Shoot(Vector2 moveDirection,float moveForce)
        rbody.AddForce(moveDirection * moveForce);
    //子弹命中
    private void OnCollisionEnter2D(Collision2D collision)
        //调用机器人控制脚本的修复函数，修改机器人的状态
        RobotControl ec = collision.gameObject.GetComponent<RobotControl>();
        if (ec!=null)
            Debug.Log("命中敌人了");
            ec.Fixed();//杀敌
            //更改玩家控制中的击杀数，以此判断任务是否完成，格式：脚本名.静态变量--;
            PlayerControl.enemyleft--;
        //播放命中声
        AudioManager.instance.AudioPlay(hitClip);
        //立即销毁子弹
        Destroy(this.gameObject);
附完整教程：
 
Unity2d Rubys Adventure 课程设计报告
https://blog.csdn.net/weixin_43673589