/// <summary>
 /// 执行数据加载任务
 /// </summary>
 /// <param name="task_temp"></param>
 void excuteLoadTask(LoadTask task_temp)
 {
     if (task_temp.done_callback.GetType().Equals(typeof(Action <UnityWebRequest>)))
     {
         StartCoroutine(loadData(task_temp.path_or_Uri, (Action <UnityWebRequest>)task_temp.done_callback, task_temp.fail_callback));
     }
 }
 // Update is called once per frame
 void Update()
 {
     if (loadDataTask.Count > 0)
     {
         task_temp = loadDataTask.Dequeue();
         excuteLoadTask(task_temp);
     }
 }