/// <summary>
 /// 加载AB包资源
 /// </summary>
 /// <param name="scenesName">场景名</param>
 /// <param name="abName">包名</param>
 /// <param name="assetName">资源名</param>
 /// <param name="isCache">是否缓存</param>
 /// <returns></returns>
 public Object LoadAsset(string scenesName, string abName, string assetName, bool isCache)
 {
     if (allScenes.ContainsKey(scenesName))
     {
         MultABMgr multABMgr = allScenes[scenesName];
         return(multABMgr.LoadAsset(abName, assetName, isCache));
     }
     Debug.LogError(GetType() + $"/LoadAsset()do not find scenes,can't loadAsset, scenesName={scenesName}");
     return(null);
 }
 /// <summary>
 /// 加载AB包资源
 /// </summary>
 /// <param name="scenesName">场景名</param>
 /// <param name="abName">包名</param>
 /// <param name="assetName">资源名</param>
 /// <param name="isCache">是否缓存</param>
 /// <returns></returns>
 public void DisposeAllAssets(string scenesName)
 {
     if (allScenes.ContainsKey(scenesName))
     {
         MultABMgr multABMgr = allScenes[scenesName];
         multABMgr.DisposeAllAsset();
     }
     else
     {
         Debug.LogError(GetType() + $"/DisposeAllAssets()do not find scenes,can't DisposeAllAssets, scenesName={scenesName}");
     }
 }
        public IEnumerator LoadAB(string sencesName, string abName, DelLoadComplete loadAllCompleteHandle)
        {
            //参数检查
            if (string.IsNullOrEmpty(sencesName) || string.IsNullOrEmpty(abName))
            {
                Debug.LogError(GetType() + "/LoadAB()/sencesName or abName==null,please check!");
            }
            //等待Manifest清单文件加载完成
            while (!ABManifestLoader.Instance.isLoadFinish)
            {
                yield return(null);
            }
            manifest = ABManifestLoader.Instance.GetABManifest();
            if (manifest == null)
            {
                Debug.LogError(GetType() + "/LoadAB()/manifest==null,please check!");
                yield return(null);
            }

            MultABMgr multABMgr;

            //把当前场景加入到集合中
            if (!allScenes.ContainsKey(sencesName))
            {
                multABMgr = new MultABMgr(sencesName, abName, loadAllCompleteHandle);
                allScenes.Add(sencesName, multABMgr);
            }

            //调用下一层(多包管理员)
            multABMgr = allScenes[sencesName];
            if (multABMgr == null)
            {
                Debug.LogError(GetType() + "/LoadAB()/multABMgr==null,please check!");
            }
            //调用多包管理类的加载指定AB包
            yield return(multABMgr.LoadAB(abName));
        }