Unity AssetBundle 打包小记

1.命名

命名注意：sky表示生成的目录 sky01 是ab包的名字。  ab是生成文件的后缀名

2.打包脚本

 [MenuItem("ThrusdayFrame/Build AssetBundle")]
    public static void BuildBundle()
    {
        string dir = "AssetBundles";
        if (Directory.Exists(dir) == false)
        {
            Directory.CreateDirectory(dir);
        }
        //BuildTarget 选择build出来的AB包要使用的平台
        BuildPipeline.BuildAssetBundles(dir, BuildAssetBundleOptions.None, BuildTarget.StandaloneWindows);
    }

3.加载脚本，以网络地址下载天空和材质球更换为例。

 IEnumerator DoChangeOnLine(string key)
    {
        //网络地址
        string str = "http://192.168.1.121/AssetBundles/sky/sky" + key + ".ab";
        //下载
        UnityWebRequest wb = UnityWebRequestAssetBundle.GetAssetBundle(str);
        yield return wb.SendWebRequest();
        //获取
        AssetBundle assetBundle = DownloadHandlerAssetBundle.GetContent(wb);
        if (wb.isDone)
        {
            Debug.Log(wb.error);

            temp = RenderSettings.skybox.GetFloat("_Exposure");
            while (temp > 0.01f)
            {
                temp -= Time.deltaTime * changeSpeed;
                temp = Mathf.Clamp(temp, 0, 1);
                RenderSettings.skybox.SetFloat("_Exposure", temp);
                yield return null;
            }
           //替换
            RenderSettings.skybox = assetBundle.LoadAssetAsync<Material>("Mat_" + key).asset as Material;

            blackToDo?.Invoke();

            RenderSettings.skybox.SetFloat("_Exposure", 0);
            temp = RenderSettings.skybox.GetFloat("_Exposure");
            while (temp < 0.99f)
            {
                temp += Time.deltaTime * changeSpeed;
                temp = Mathf.Clamp(temp, 0, 1);
                RenderSettings.skybox.SetFloat("_Exposure", temp);
                yield return null;
            }

        }
        yield return null;

    }