public IEnumerator RequireRoundInfo(int round, OneRoundInfoCallback callback) { if (isDrawing) { yield return(null); } isDrawing = true; mResult = null; using (UnityWebRequest webReqest = UnityWebRequest.Get(RequireNormalURL + round)) { yield return(webReqest.SendWebRequest()); if (webReqest.isNetworkError) { Debug.Log("网络连接错误"); } isDrawing = false; string value = webReqest.downloadHandler.text; callback?.Invoke(RoundInfo.FromStringOne(value)); } }