onlineState property

~english Whether the message gets delivered to an online user.

This field is issued by the server to indicate whether the recipient is online when the message is delivered.

This field is not stored in the local database. The value of this field is true by default for messages read from the database or pulled from the server. ~end

~chinese 该字段标记服务器下发消息时判断用户是在线还是离线的状态。

该字段为服务器下发字段，不在本地数据库中存储。对于从数据库读取的消息或拉取的漫游消息，该字段的值默认为 true。 ~end