子弹射击碰撞并销毁的方法

 void OnTriggerEnter2D(Collider2D other)
    {
       
        if (other.tag == "Enemy")
        {    
           other.SendMessage("BeHit");
            GameObject.Destroy(this.gameObject);
        }
    }

然后在enemy脚本中添加BeHit方法

 public void BeHit(int hp)
    {
        hp -= 1;
        if (hp<=0)
        {
           // GameObject.Instantiate(enemyExpollusion, transform.position, Quaternion.identity);
            GameObject.Destroy(this.gameObject);
        }
    }