AssetBundle加载资源的过程

AssetBundle加载资源的过程

参考代码如下：

IEnumerator LoadAsset()
{
//首先加载总Manifest文件;
WWW wwwAll = new WWW(BundleURL+ "StreamingAssets");
yield return wwwAll;
if (!string.IsNullOrEmpty(wwwAll.error))
{
Debug.LogError(wwwAll.error);
}
else
{
AssetBundle ab = wwwAll.assetBundle;
AssetBundleManifest manifest = (AssetBundleManifest)ab.LoadAsset("AssetBundleManifest");
ab.Unload(false);

//获取依赖文件列表;
string[] depends = manifest.GetAllDependencies("cube.unity3d");
AssetBundle[] dependsAssetBundle = new AssetBundle[depends.Length];

for (int index = 0; index < depends.Length; index++)
{
//加载所有的依赖文件;
WWW dwww = WWW.LoadFromCacheOrDownload(BundleURL + depends[index], 0);
yield return dwww;
dependsAssetBundle[index] = dwww.assetBundle;
}

//加载我们需要的文件;
WWW www = new WWW(BundleURL + "cube.unity3d");
yield return www;
if (!string.IsNullOrEmpty(www.error))
{
Debug.LogError(www.error);
}
else
{
AssetBundle assetBundle = www.assetBundle;

AssetBundleRequest request = assetBundle.LoadAssetAsync("cube", typeof(GameObject));

// Wait for completion
yield return request;

// Get the reference to the loaded object
GameObject obj = request.asset as GameObject;

Instantiate(obj);

assetBundle.Unload(false);
}

//卸载依赖文件的包
for (int index = 0; index < depends.Length; index++)
{
dependsAssetBundle[index].Unload(false);
}
}
}