/// <summary> /// 查询收到的消息是否已经发送过已读回执 /// </summary> /// <param name="msg">消息</param> /// <param name="jsonExt">json扩展参数(备用,目前不需要)</param> /// <returns></returns> public static bool IsMsgReceiptSended(NIMIMMessage msg, string jsonExt = null) { var msgJson = msg.Serialize(); return(MsglogNativeMethods.nim_msglog_query_receipt_sent(msgJson, jsonExt)); }