private IEnumerator doAsynLoad()
        {
            var bundleLoadRequest = AssetBundle.LoadFromFileAsync(Path.Combine(LYAssetManager.FolderPath, m_assertName));

            yield return(bundleLoadRequest);

            AssetBundle bundle = bundleLoadRequest.assetBundle;

            if (bundle == null)
            {
                Debug.LogError("AssetBundleName file not exist:" + Path.Combine(LYAssetManager.FolderPath, m_assertName));
                yield break;
            }
            Debug.Log("AssetBundleName loaded:" + Path.Combine(LYAssetManager.FolderPath, m_assertName));
            LYAssetCache.SetBundleCache(m_assertName, new LYAssetBundle(bundle, m_assertName));
            m_state = State.Loaded;
        }
        private LYAssetBundle doLoadAssetBundle(string assetBundleName)
        {
            LYAssetBundle ly_bundle = LYAssetCache.GetBundleCache(assetBundleName);

            if (ly_bundle != null)
            {
                //保留一次
                ly_bundle.Retain();
                return(ly_bundle);
            }
            AssetBundle bundle = AssetBundle.LoadFromFile(Path.Combine(FolderPath, assetBundleName));

            if (bundle == null)
            {
                Debug.LogError("AssetBundleName file not exist:" + Path.Combine(FolderPath, assetBundleName));
                return(null);
            }
            ly_bundle = new LYAssetBundle(bundle, assetBundleName);
            LYAssetCache.SetBundleCache(assetBundleName, ly_bundle);
            return(ly_bundle);
        }