iOS 插入消息 直接在聊天页面 UI没有更新， insertmessage 那个方法

EMConversation *conversation = [[EMClient sharedClient].chatManager getConversation:groupId type:EMConversationTypeGroupChat createIfNotExist:YES];

    

    EMMessage *message = [EaseSDKHelper sendTextMessage:messageText to: conversation.conversationId messageType:EMChatTypeGroupChat messageExt:ext];

    [conversation insertMessage:message error:nil];