Alex教程每一P的教程原代码加上我自己的理解初步理解写的注释，可供学习Alex教程的人参考
此代码仅为较上一P有所改变的代码

【Unity教程】从0编程制作类银河恶魔城游戏_哔哩哔哩_bilibili

Entity.cs

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

public class EntityFX : MonoBehaviour
{
    private SpriteRenderer sr;//定义SR组件来保持要用的组件
    [Header("Flash FX")]
    [SerializeField] private Material hitMat;//要改成的材料
    [SerializeField] private float flashDuration;//闪光的时间
    private Material originalMat;//原来的材料

    [Header("Aliment colors")]
    [SerializeField] private Color[] chillColor;
    [SerializeField] private Color[] igniteColor;
    [SerializeField] private Color[] shockColor;

    [Header("Aliment particles")]
    [SerializeField] private ParticleSystem igniteFX;
    [SerializeField] private ParticleSystem chillFX;
    [SerializeField] private ParticleSystem shockFX;
    private void Start()
    {
        sr = GetComponentInChildren<SpriteRenderer>();//从子组件中拿到SR组件


        originalMat = sr.material;//拿到原来的材料

    }

    public void MakeTransprent(bool isClear)
    {
        if (isClear)
            sr.color = Color.clear;
        else
            sr.color = Color.white;
    }

    private IEnumerator FlashFX()//被打后该触发的函数
    {
        sr.material = hitMat;

        //修复在元素效果期间击中，颜色变红的情况
        Color currentColor = sr.color;
        sr.color = Color.white;


        yield return new WaitForSeconds(flashDuration);

        sr.color = currentColor;
        sr.material = originalMat;
    } //IEnumertor本质就是将一个函数分块执行，只有满足某些条件才能执行下一段代码，此函数有StartCoroutine调用
    //https://www.zhihu.com/tardis/bd/art/504607545?source_id=1001
    private void RedColorBlink()//使角色闪烁的函数
    {
        if (sr.color != Color.white)
        {
            sr.color = Color.white;
        }
        else
        {
            sr.color = Color.red;
        }
    }
    private void CancelColorChange()//使角色停止闪烁的函数
    {
        CancelInvoke();//取消该 MonoBehaviour 上的所有 Invoke 调用。
        //https://docs.unity3d.com/cn/current/ScriptReference/MonoBehaviour.CancelInvoke.html
        sr.color = Color.white;

        igniteFX.Stop();
        chillFX.Stop();
        shockFX.Stop();
    }

    public void ShockFxFor(float _second)
    {
        shockFX.Play();

        InvokeRepeating("ShockColorFx", 0, .3f);
        Invoke("CancelColorChange", _second);
    }

    public void ChillFxFor(float _second)
    {
        chillFX.Play();

        InvokeRepeating("ChillColor", 0, .3f);
        Invoke("CancelColorChange", _second);
    }



    public void IgniteFxFor(float _second)
    {
        igniteFX.Play();

        InvokeRepeating("IgniteColorFX", 0, .3f);
        Invoke("CancelColorChange", _second);
    }

    private void IgniteColorFX()
    {
        if (sr.color != igniteColor[0])
            sr.color = igniteColor[0];
        else
            sr.color = igniteColor[1];
    }

    private void ShockColorFx()
    {
        if (sr.color != shockColor[0])
            sr.color = shockColor[0];
        else
            sr.color = shockColor[1];
    }

    private void ChillColor()
    {
        if (sr.color != chillColor[0])
            sr.color = chillColor[0];
        else
            sr.color = chillColor[1];
    }

   
}