Unity3d基础：加载AssetBundle资源

//通过AssetBundle资源名字加载并创建物体   

1. public GameObject CreateAndLoadAssetBundle(string bundleName,string objName=null)
2.     {
3.         //路径
4.         string url = Application.dataPath + "/" +  "StreamingAssets/"  + bundleName.ToLower() + ".assetbundle";
5.         byte[] stream = File.ReadAllBytes(url);
6. ---------------------------------------------------------------------------------------------------------------------------
7.         //从内存 异步加载
8.          AssetBundleCreateRequest request = AssetBundle.LoadFromMemoryAsync(stream);
9.         AssetBundle bundle =request.assetBundle;
10. ---------------------------------------------------------------------------------------------------------------------------       
11.         //同步加载资源，从内存加载
12.         AssetBundle bundle = AssetBundle.LoadFromMemory(stream);
13. --------------------------------------------------------------------------------------------------------------------------
14.         //异步从本地加载
15.          AssetBundleCreateRequest request = AssetBundle.LoadFromFileAsync(url);
16.         AssetBundle bundle =request.assetBundle;
17. --------------------------------------------------------------------------------------------------------------------------
18.        //从本地加载
19.          AssetBundle bundle = AssetBundle.LoadFromFile(url);
20. ---------------------------------------------------------------------------------------------------------------------------
21.         //使用WWW类加载
22.          WWW www = WWW.LoadFromCacheOrDownload(url,1);
23.          AssetBundle bundle =www.assetBundle;
24. ---------------------------------------------------------------------------------------------------------------------------
25.         //UnityWebRequest下载可代替www
26.         UnityWebRequest request = UnityWebRequest.GetAssetBundle(url);
27.          AssetBundle bundle = (request.downloadHandler as DownloadHandlerAssetBundle).assetBundle;
28. ---------------------------------------------------------------------------------------------------------------------------
29.         GameObject prefab = null;
30.         if (bundle==null)
31.         {
32.             return null;
33.         }
34.         //按照名字加载
35.         if (objName!=null)
36.         {
37.             prefab = bundle.LoadAsset(objName,typeof(GameObject))as GameObject;
38.         }//默认
39.         else
40.         {
41.             prefab = bundle.mainAsset as GameObject;
42.         }
43.         //创建物体
44.         GameObject go = GameObject.Instantiate(prefab)as GameObject;
45.         go.name = bundleName;
46.         //释放AssetBundel资源
47.         bundle.Unload(false);
48.         return go;      
49.     }