5.2_AssetBundles（加载）

读取资源文件：

创建C#脚本名称为RunAssetBundles。

using UnityEngine;

using System.Collections;

public class RunAssetBundles : MonoBehaviour {

    //AssetBundle资源路径,不同平台下StreamingAssets的路径是不同的，这里需要注意一下。

    public static readonly string PathURL =

#if UNITY_ANDROID//安卓

     "jar:file://" + Application.dataPath + "!/assets/";

#elif UNITY_IPHONE//苹果手机

      Application.dataPath + "/Raw/";

#elif UNITY_STANDALONE_WIN || UNITY_EDITOR//windows或unity编辑器

 "file://" + Application.dataPath + "/StreamingAssets/";

#else

    String.Empty;

#endif

    void OnGUI()

    {

        if (GUILayout.Button("Prefab0"))

        {

            StartCoroutine(LoadMainObj(PathURL + "Prefab0.assetbundle"));

        }

        if (GUILayout.Button("Prefab1"))

        {

            StartCoroutine(LoadMainObj(PathURL + "Prefab1.assetbundle"));

        }

        if (GUILayout.Button("All AssetBundle"))

        {

            StartCoroutine(LoadAllObj(PathURL + "ALL.assetbundle"));

        }

        if (GUILayout.Button("Open Scene"))

        {

            StartCoroutine(LoadAllObj(PathURL + "MyScene.unity3d"));

        }

    }

    private IEnumerator LoadMainObj(string path)

    {

        //下载类WWW（"路径"），bundle只保存在内存中

        WWW bundle = new WWW(path);

        yield return bundle;

        //实例化获取的assetbundle对象

        yield return Instantiate(bundle.assetBundle.mainAsset);

       // 卸载所有包含在bundle中的内存镜像,若参数为true，在使用中的对象也会被清楚（慎用）

        bundle.assetBundle.Unload(false);    

    }

    private IEnumerator LoadAllObj(string path) {

        WWW bundle = new WWW(path);

        yield return bundle;

        Object obj0=bundle.assetBundle.LoadAsset("Prefab0");

        Object obj1=bundle.assetBundle.LoadAsset("Prefab1");

        yield return Instantiate(obj0);

        yield return Instantiate(obj1);

//施放内存--参数：false释放内存、true对象也会被删除

        bundle.assetBundle.Unload(false);

    }

private IEnumerator LoadScene(string path)

{

 var download=  WWW. LoadFromCacheOrDownload(PathURL + "AssetbundleScene.unity3d",1);

  yield return download;

     Application.LoadLevel ("MyScene");

}

}

/*补充：

也可以用AssetBundle.CreatFromFile下载。

Prefab打包资源包选项为

BuildAssetBundleOptions.CollectDependencies|BuildAssetBundleOptions.UncompressedAssetBundle

Scene打包资源包选项为

BuildOptions.UncompressedAssetBundle

路径地址中没有file://

(Android平台中要注意：www方法中路径apk!/assets，CreatFromFile方法中路径apk!asse，叹号后面没有/)

string path=Application.dataPath + "/StreamingAssets/"+"资源名称";

 AssetBundle download = AssetBundle.CreateFromFile(path);

yield return download;