Unity各种GUID链接记录-1

一般情况下，文件meta中的GUID即为资产唯一ID

但是像FBX这样，内置了多个资产的，就不能使用文件meta的GUID

(string, string) FindFbxMeshGuidAndFileId(string fbxPath)
{
    List<string> meshGuids = new List<string>();
    var allAssetPaths = AssetDatabase.LoadAllAssetsAtPath(fbxPath);
    foreach(var assetObj in allAssetPaths)
    {
        if (assetObj is Mesh)
        {
            if (AssetDatabase.TryGetGUIDAndLocalFileIdentifier(assetObj, out var guid, out long fileId))
            {
                return (guid, fileId);
            }
        }
    }

    return (string.Empty, string.Empty);
}

以上代码即可获得FBX中第1个Mesh的(Guid, fileId)引用