环信批量删除聊天记录怎么搞

循环调用删除
//删除和某个user会话，如果需要保留聊天记录，传false
EMClient.getInstance().chatManager().deleteConversation(username, true);
//删除当前会话的某条聊天记录
EMConversation conversation = EMClient.getInstance().chatManager().getConversation(username);
conversation.removeMessage(deleteMsg.msgId);