编辑器拓展七——不实例化的情况下修改Assets下面的文件

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using System.IO;

public class ChangeShader : Editor {
    [MenuItem("MyTool/changeShader")]
    static void chang()
    {
        //路径数组
        List<string> MaterialPathFile = new List<string>();
        //用了Standard (Specular setup)的材质球数组
        List<Material> material01 = new List<Material>();
        //用了Standard的材质球数组
        List<Material> material02 = new List<Material>();

        string path = Application.dataPath;
        //返回mat的文件名（D:/TA/standard/Assets\ball.mat），后面要用到Assets后面的来load  所以要把前面的部分去掉
        MaterialPathFile = new List<string>( Directory.GetFiles(path, "*.mat", SearchOption.AllDirectories));
        
        //根据文件名 将材质球load出来 将用了Standard的材质球加到数组里
        for (int i = 0; i < MaterialPathFile.Count; i++)
        {

            //去掉数组了的全部文件名Assets之前的部分
            string st = MaterialPathFile[i];
            //用/将字符串隔开 分成4个数组
            string[] sArray = st.Split(‘/‘);
            string path01 = sArray[4];
            
         
            Material[] m_material = new Material[MaterialPathFile.Count];
            //通过包含路径的文件名 将所有的材质球load出来
            m_material[i] = AssetDatabase.LoadAssetAtPath<Material>(path01);

            //如果材质球用了Standard的shader 将其加到material数组
            if (m_material[i].shader == Shader.Find("Standard (Specular setup)"))//这里一定要注意空格
            {
                material01.Add(m_material[i]);
            }
            if (m_material[i].shader == Shader.Find("Standard"))
            {
                material02.Add(m_material[i]);
            }


        }
        
        //遍历用了standard的材质球，将它的材质换成game_XXX/Standard
        for(int i = 0; i < material01.Count; i++)
        {
            Debug.Log(material01[i].name);
            material01[i].shader = Shader.Find("Game_XXX/Standard (Specular setup_NoFog)");

        }
        for (int i = 0; i < material02.Count; i++)
        {
            material02[i].shader = Shader.Find("Game_XXX/Standard_NoFog");
        }
    }

}