下载某资源文件并加载其中的所有Prefab到场景中

 using System.Collections;

 using System.Collections.Generic;

 using UnityEngine;

 /// <summary>

 /// LoadAssets打开某资源文件并加载其中的所有Prefab到场景中

 /// </summary>

 public class LoadAssets : MonoBehaviour

 {

     [HideInInspector]

     public string address;//资源所在文件夹路径

     public string fileToLoad;//资源文件名

     private string manifestAssetBundleName;//Manifest文件，一般与所在文件夹名称相同

     private AssetBundleManifest manifest;

     private List<AssetBundle> assetBundles = new List<AssetBundle>();

     private void Awake()

     {

         if(address.Equals(""))

             return;

         //Manifest文件的名称与生成的AssetBundle所在的文件夹同名

         string[] ss = address.Split('/');

         manifestAssetBundleName = ss[ss.Length - ];

         LoadManifest(address + manifestAssetBundleName);

         LoadDepend(fileToLoad);

     }

     void OnGUI()

     {

         if (address.Equals(""))

             return;

         //第1步：读取Manifest

         if (GUILayout.Button("地图加载（选择map.unity3d）"))

         {

             StartCoroutine(LoadObj(address, fileToLoad));

             Caching.CleanCache();

         }

     }

     //同步下载并读取Manifest文件

     public void LoadManifest(string mainfestpath)

     {

         //Debug.Log("LoadManifest:"+mainfestpath);

         AssetBundle manifestBundle = AssetBundle.LoadFromFile(mainfestpath);

         if (manifestBundle != null)

         {

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

         }

     }

     //获取资源所依赖的资源并下载

     void LoadDepend(string assetName)

     {

         string[] dps = manifest.GetAllDependencies(assetName);

         for (int i = ; i < dps.Length; i++)

         {

             StartCoroutine(LoadAsset(address, dps[i]));

         }

     }

     //下载资源

     IEnumerator LoadAsset(string url, string fileName)

     {

         //Debug.Log("LoadAsset:" + url+" "+fileName);

         WWW www = WWW.LoadFromCacheOrDownload("file://" + url + fileName, manifest.GetAssetBundleHash(fileName));

         yield return www;

         assetBundles.Add(www.assetBundle);

         www.Dispose();

     }

     //下载并实例化游戏对象

     IEnumerator LoadObj(string url, string fileName)

     {

         //Debug.Log("LoadOBJ:" + url + " " + fileName);

         WWW www = WWW.LoadFromCacheOrDownload("file://" + url + fileName, manifest.GetAssetBundleHash(fileName));

         yield return www;

         string[] AssetsNames = www.assetBundle.GetAllAssetNames();

         foreach (string m in AssetsNames)

         {

             GameObject prefab = www.assetBundle.LoadAsset(m) as GameObject;

             GameObject obj = GameObject.Instantiate(prefab);

         }

         assetBundles.Add(www.assetBundle);

         www.Dispose();

         UnloadUnuseAssetBundle();

     }

     //清理未使用资源所占用的内存

     void UnloadUnuseAssetBundle()

     {

         foreach (var item in assetBundles)

         {

             item.Unload(false);

         }

     }

 }