/// <summary>
/// 卸载一个AssetData和其中的AssetBundle
/// </summary>
/// <param name="data"></param>
public void ReleaseAsset(StorageAssetData data)
{
data.bundle.Unload(true);
if (storageAssetDic.ContainsKey(data.assetName))
{
storageAssetDic.Remove(data.assetName);
}
}
/// <summary>
/// 加载一个AssetData和其中的AssetBundle
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
public StorageAssetData LoadAsset(string fileName)
{
if (!File.Exists(fileName))
{
Debug.Log("No such File! " + fileName);
return(null);
}
byte[] bytes = File.ReadAllBytes(fileName);
StorageAssetData data = DecryptAsset(bytes);
return(data);
}
/// <summary>
/// 解密Asset
/// </summary>
/// <param name="assetBytes"></param>
/// <returns></returns>
private StorageAssetData DecryptAsset(byte[] assetBytes)
{
StorageAssetData data = null;
byte[] bt = null;
int index = 0;
// 读取文件名长度
int assetNameLen;
BytesUtility.GetIntFromBytes(assetBytes, out assetNameLen, ref index);
Debug.Log("Read asset name Length=" + assetNameLen);
// 读取文件名
bt = new byte[assetNameLen];
Array.Copy(assetBytes, index, bt, 0, assetNameLen);
index += assetNameLen;
string assetName = Encoding.UTF8.GetString(bt);
Debug.Log("Read asset name=" + assetName);
// 读取Asset
// 判断是否已经加载该资源
if (storageAssetDic.ContainsKey(assetName))
{
data = storageAssetDic[assetName];
Debug.Log("Has loaded this asset!");
}
else
{
data = new StorageAssetData();
data.assetName = assetName;
// 读取文件路径长度
int fileNameLen;
BytesUtility.GetIntFromBytes(assetBytes, out fileNameLen, ref index);
Debug.Log("Read asset file name Length=" + fileNameLen);
// 读取文件路径
bt = new byte[fileNameLen];
Array.Copy(assetBytes, index, bt, 0, fileNameLen);
index += fileNameLen;
data.assetFileName = Encoding.UTF8.GetString(bt);
Debug.Log("Read file name=" + data.assetFileName);
// 读取Asset文件长度
long fileLen;
BytesUtility.GetLongFromBytes(assetBytes, out fileLen, ref index);
Debug.Log("Read file len=" + fileLen);
byte[] assetData = new byte[fileLen];
Array.Copy(assetBytes, index, assetData, 0, (int)fileLen);
data.bundle = AssetBundle.LoadFromMemory(assetData);
Debug.Log("Read AssetBundle " + data.bundle);
storageAssetDic.Add(data.assetName, data);
}
return(data);
}
