我有一个投射物和一个敌人，但是我希望敌人在接触投射物时减少健康变量。
我试着射击炮弹，但它没有减少健康。
'使用系统集合;使用系统.集合.泛型;使用UnityEngine;

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

public class Health : MonoBehaviour
{
    public int startHealth = 20;
    public int health;
    // Start is called before the first frame update
    void Start()
    {
        health = startHealth;
    }

    // Update is called once per frame
    void OnTriggerEnter2D(Collider2D col)
    {
        Debug.Log("Hit");
        if (col.gameObject.tag == "PlayerProjectile")
        {
            health = health - 1;
        }
    }
    void LateUpdate()
    {
        if (health < 1)
        {
            Destroy(gameObject);
        }
    }
}