Unread messages are messages that have not been reported as read by users. This does not indicate whether the recipient has actually read the messages. To display the correct unread count, developers need to explicitly call read reports to notify the IM SDK whether the messages in a conversation are read. For example, you can mark all messages as read when the user enters the chat UI.

Obtaining the Current Unread Count

Every time you use getConversationList(), you will obtain a [Conversation，Conversation, …] array. Each Conversation has an unread count for the current conversation, which is represented by unreadCount.
The unread count of all conversations is the sum of the unreadCount values of each conversation.

Read Reports

When the user reads a message in a conversation, a read report is sent, and the IM SDK sets all messages before the last read message as read. We recommend that you send read reports when the user clicks to switch between conversations.

Note：

Read reports will change the unread count of a conversation. If you set C2C messages to read in SDK v2.7.0 or later versions, read receipts will be pushed to the message sender. For more information, see TIM.EVENT.MESSAGE_READ_BY_PEER.

API

tim.setMessageRead(options)；

Parameters

The options parameter is of the Object type. The attribute it contains is described in the following table:

Example

//Send read reports for all unread messages in a conversation
let promise = tim.setMessageRead({conversationID: 'C2Cexample'});
promise.then(function(imResponse) {
//Read reports sent successfully
}).catch(function(imError) {
//Failed to send read reports
  console.warn('setMessageRead error:', imError);
});