Widget _buildStyle(BuildContext context) {
  final size = MediaQuery.of(context).size;
  const map = {
    1: '初一',
    2: '初二',
    3: '初三',
    14: '情人节',
    15: '元宵节',
  };
  return TDCellGroup(
    cells: [
      TDCell(
        title: '自定义文案',
        arrow: true,
        onClick: (cell) {
          TDCalendarPopup(
            context,
            visible: true,
            child: TDCalendar(
              title: '请选择日期',
              height: size.height * 0.6 + 176,
              minDate: DateTime(2022, 1, 1).millisecondsSinceEpoch,
              maxDate: DateTime(2022, 2, 15).millisecondsSinceEpoch,
              format: (day) {
                day?.suffix = '¥60';
                if (day?.date.month == 2) {
                  if (map.keys.contains(day?.date.day)) {
                    day?.suffix = '¥100';
                    day?.prefix = map[day.date.day];
                    day?.style = TextStyle(
                      fontSize: TDTheme.of(context).fontTitleMedium?.size,
                      height: TDTheme.of(context).fontTitleMedium?.height,
                      fontWeight: TDTheme.of(context).fontTitleMedium?.fontWeight,
                      color: TDTheme.of(context).errorColor6,
                    );
                    if (day?.typeNotifier.value == DateSelectType.selected) {
                      day?.style = day.style?.copyWith(color: TDTheme.of(context).fontWhColor1);
                    }
                  }
                }
                return null;
              },
            ),
          );
        },
      ),
      TDCell(
        title: '自定义按钮',
        arrow: true,
        onClick: (cell) {
          late final TDCalendarPopup calendar;
          calendar = TDCalendarPopup(
            context,
            visible: true,
            confirmBtn: Padding(
              padding: EdgeInsets.symmetric(vertical: TDTheme.of(context).spacer16),
              child: TDButton(
                theme: TDButtonTheme.danger,
                shape: TDButtonShape.round,
                text: 'ok',
                isBlock: true,
                size: TDButtonSize.large,
                onTap: () {
                  print(calendar.selected);
                  calendar.close();
                },
              ),
            ),
            child: TDCalendar(
              title: '请选择日期',
              value: [DateTime.now().millisecondsSinceEpoch],
              height: size.height * 0.6 + 176,
            ),
          );
        },
      ),
      TDCell(
        title: '自定义日期区间',
        arrow: true,
        onClick: (cell) {
          TDCalendarPopup(
            context,
            visible: true,
            child: TDCalendar(
              title: '请选择日期',
              minDate: DateTime(2022, 1, 1).millisecondsSinceEpoch,
              maxDate: DateTime(2022, 1, 31).millisecondsSinceEpoch,
              value: [DateTime(2022, 1, 15).millisecondsSinceEpoch],
              height: size.height * 0.6 + 176,
            ),
          );
        },
      ),
    ],
  );
}