startTs property

~english The start time for message query. The time is a UNIX time stamp in milliseconds. The default value is -1, indicating that this parameter is ignored during message query. If the startTs is set to a specific time spot and the endTs uses the default value -1, the SDK returns messages that are sent and received in the period that is from the start time to the current time. If the startTs uses the default value -1 and the endTs is set to a specific time spot, the SDK returns messages that are sent and received in the period that is from the timestamp of the first message to the current time. ~end

~chinese 消息查询的起始时间，Unix 时间戳，单位为毫秒。默认为 -1，表示消息查询时会忽略该参数。 若 startTs 设置为特定时间点，而 endTs 采用默认值 -1，则查询起始时间至当前时间的消息。 若 startTs 采用默认值 -1，而 endTs 设置了特定时间，SDK 返回从会话中最早的消息到结束时间点的消息。 ~end