assetbundle打包的一種用法

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
public class TestBunildAssetB  {

    //在Unity編輯器中添加菜單  
    [MenuItem("BuildAssetBundles/BuildSelectAssetbundle")]
    static void BuildAssetbundleSelect()
    {
        // 打開保存面板，選擇路徑並保存 
        string outputPath = EditorUtility.SaveFolderPanel("Build Select Assetbundle", "", "");
        if (outputPath.Length != 0)
        {
            BuildTarget activeTarget = EditorUserBuildSettings.activeBuildTarget;
            AssetBundleBuild[] buildMap = new AssetBundleBuild[Selection.assetGUIDs.Length];
            for (int i = 0; i < Selection.assetGUIDs.Length; i++)
            {
                string guid = Selection.assetGUIDs[i];
                //將GUID(全局唯一標識符)轉換爲對應的資源路徑。
                //所有的路徑都是相對於工程目錄文件。例如” Assets/MyTextures/hello.png”
                string assetPath = AssetDatabase.GUIDToAssetPath(guid);
                //報告指定 Unicode 字符在此實例中的最後一個匹配項的索引位置。
                int startindex = assetPath.LastIndexOf('/') + 1;
                int length = assetPath.LastIndexOf('.') - startindex;
                //此處是打包後的文件名;根據guid命名，並且自定義後綴名
                buildMap[i].assetBundleName = assetPath.Substring(startindex, length) + ".assetbundle";
                buildMap[i].assetNames = new string[1];
                buildMap[i].assetNames[0] = assetPath;
            }
            //打包  
            BuildPipeline.BuildAssetBundles(outputPath, buildMap, BuildAssetBundleOptions.None, activeTarget);
        }
    }
}