月视图中不会出现“ +更多”信息

Question

我的日历默认视图是月。在月份视图中，“ +更多”未显示。但是当单击周视图并返回到月视图时，我可以看到“ +更多”。有人可以帮我吗？

import React, { Component } from 'react';
import { Calendar as BigCalendar, momentLocalizer } from 'react-big-calendar';
import 'react-big-calendar/lib/css/react-big-calendar.css';
import moment from 'moment';
import events from './events';

const localizer = momentLocalizer(moment);

export default class MyCalendar extends Component {
  constructor(props) {
    super(props);
    this.state = {
      test: '',
    };
  }

  render() {
    return (
      <BigCalendar
         localizer={localizer}
         events={events}
         startAccessor="start"
         endAccessor="end"
         defaultDate={new Date()}
         popup
       />
     );
  }
}