/// <summary>
/// 检查文件是否存在，检查顺序为Persist然后Stream
/// </summary>
/// <param name="dir"></param>
/// <param name="path"></param>
/// <param name="pos"></param>
/// <returns></returns>
public static bool IsFileExist(string dir, string fileName, out eFileLoaderPosType pos)
{
if (UnityPersistFileHelper.IsPersistAssetFileExist(dir, fileName))
{
pos = eFileLoaderPosType.PersistAsset;
return(true);
}
if (UnityStreamingFileHelper.IsStreamAssetFileExist(dir, fileName))
{
pos = eFileLoaderPosType.StreamAsset;
return(true);
}
pos = eFileLoaderPosType.None;
return(false);
}
public static Stream ReadFileByStream(string dir, string fileName, out eFileLoaderPosType pos, int offset = 0)
{
var hasFile = IsFileExist(dir, fileName, out pos);
if (hasFile)
{
if (pos == eFileLoaderPosType.PersistAsset)
{
return(UnityPersistFileHelper.ReadPersistAssetFileByStream(dir, fileName, offset));
}
if (pos == eFileLoaderPosType.StreamAsset)
{
return(UnityStreamingFileHelper.ReadStreamAssetFileByStream(dir, fileName, offset));
}
}
return(null);
}
public static byte[] ReadFileAllBytes(string dir, string fileName, out eFileLoaderPosType pos)
{
var hasFile = IsFileExist(dir, fileName, out pos);
if (hasFile)
{
if (pos == eFileLoaderPosType.PersistAsset)
{
return(UnityPersistFileHelper.ReadPersistAssetFileAllBytes(dir, fileName));
}
if (pos == eFileLoaderPosType.StreamAsset)
{
return(UnityStreamingFileHelper.ReadStreamAssetFileAllBytes(dir, fileName));
}
}
return(null);
}
public static AssetBundleCreateRequest ReadAssetBundleAsync(string dir, string fileName, ulong offset, out eFileLoaderPosType pos, uint crc = 0U)
{
var hasFile = IsFileExist(dir, fileName, out pos);
if (hasFile)
{
if (pos == eFileLoaderPosType.PersistAsset)
{
return(UnityPersistFileHelper.ReadPersistAssetBundleAsync(dir, fileName, offset, crc));
}
if (pos == eFileLoaderPosType.StreamAsset)
{
return(UnityStreamingFileHelper.ReadStreamAssetBundleAsync(dir, fileName, offset, crc));
}
}
return(null);
}