//执行加载单个资源
private void AddSingleTask(ReferInfo info, Action callBack = null, bool isShowWaitcircle = true)
{
AssetTaskNodeBase curNode = AssetTaskNodeBase.CreatLoadNode(_resMgr, info.m_isSingleAsset);
curNode.AddNode(info, isShowWaitcircle, callBack);
_listTaskObj.Add(curNode);
}
