AssetBundle的使用初涉

　　前几天看的AssetBundle的使用，今天把它先整理一下，在unity3d中的资源的打包和加载基本都是通过AssetBundle 来实现的，

AssetBundle配合WWW一起实现从服务器端或者内存中动态加载资源，下面是我看刘国柱老师书借鉴着写的一段AssetBundle加载本地中

资源的例子。代码部分如下：

using UnityEngine;
using System.Collections;

public class Load01 : MonoBehaviour
{
    //首先加载总的manifest文件
    private string manifestName ="StreamingAssets";

    //加载assetsBudles文件
    private string assetBundleName = "test";

    IEnumerator Start()
    {

        Debug.Log(Application.dataPath);
    //{
    //    //WWW www = new WWW("http://baike.baidu.com/");
    //    WWW www = WWW.LoadFromCacheOrDownload("http://www.baidu.com/",5);
    //    yield return www;
    //    Debug.Log(www.GetType().ToString());
       
        //AssetBundle所在的路径
        string assetBundlePath = "file:D:/Lianxi_File/Unity/Message/MessageDemo/Assets/StreamingAssets/";
        ////string assetBundlePath = "file:D:/Lianxi_File/Unity/Message/MessageDemo/Assets/StreamingAssets/StreamingAssets";

        //manifest 文件的路径
        string manifestPath = assetBundlePath + manifestName;
        //string manifestPath="file:D:/Lianxi_File/Unity/Message/MessageDemo/Assets/StreamingAssets/StreamingAssets";


        //首先加载manifest文件
        WWW wwwManifest = WWW.LoadFromCacheOrDownload(manifestPath,0);

        yield return wwwManifest;

        //判断是否加载到资源
        if(!string.IsNullOrEmpty(wwwManifest.error))    //wwwManifest.error==null
        {
            Debug.Log(wwwManifest.error);
            yield break;
        }

        else
        {
            AssetBundle manifestBundles = wwwManifest.assetBundle;

            AssetBundleManifest manifest = (AssetBundleManifest)manifestBundles.LoadAsset("AssetBundleManifest");

            manifestBundles.Unload(false);

            //获取依赖文件列表
            string[] dependentAssetBundles = manifest.GetAllDependencies(assetBundleName);
            AssetBundle[] abs = new AssetBundle[dependentAssetBundles.Length];
            Debug.Log(dependentAssetBundles.Length);
            for (int i = 0; i < dependentAssetBundles.Length;i++ )
            {
                //加载所有的依赖文件（第一次加载）
                WWW www1 = WWW.LoadFromCacheOrDownload(assetBundlePath+dependentAssetBundles[i],0);
                yield return www1;
                Debug.Log("1111");
            }

            //加载需要的文件(从缓存中加载出来，第二次加载)
            WWW www2 = WWW.LoadFromCacheOrDownload(assetBundlePath+assetBundleName,0);

            yield return www2;
            AssetBundle assetBundle = www2.assetBundle;
            Debug.Log(assetBundle.ToString());
            Debug.Log("finish");
        }
    }
}
 

以上是写的加载的例子，过程中遇到一些问题，后续会更加完善

........未完待续