flutter中TableCalendar日历中设置个控制日历收起打开的按钮

您可以使用`ExpansionPanelList`小部件来实现一个可展开/折叠的日历。

首先，您需要创建一个`ExpansionPanel`小部件列表来存储您的日历和按钮。每个`ExpansionPanel`都会有一个标题和内容，您可以将日历放在内容部分。

以下是一个简单的示例代码，演示了如何在Flutter中创建一个带有展开/折叠按钮的日历：

import 'package:flutter/material.dart';
import 'package:table_calendar/table_calendar.dart';

class CalendarPage extends StatefulWidget {
  @override
  _CalendarPageState createState() => _CalendarPageState();
}

class _CalendarPageState extends State<CalendarPage> {
  bool _isExpanded = false;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Calendar'),
      ),
      body: SingleChildScrollView(
        child: Padding(
          padding: const EdgeInsets.all(8.0),
          child: ExpansionPanelList(
            elevation: 1,
            expandedHeaderPadding: EdgeInsets.zero,
            expansionCallback: (int index, bool isExpanded) {
              setState(() {
                _isExpanded = !isExpanded;
              });
            },
            children: [
              ExpansionPanel(
                headerBuilder: (BuildContext context, bool isExpanded) {
                  return ListTile(
                    leading: Icon(Icons.calendar_today),
                    title: Text('Calendar'),
                  );
                },
                body: _isExpanded ? buildCalendar() : Container(),
                isExpanded: _isExpanded,
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget buildCalendar() {
    return TableCalendar(
      // 日历配置选项
      // ...
      calendarStyle: