如何在flutter默认日期选择器小部件中删除时间戳并仅从日期选择器获取日期

dependencies:
  flutter:
    sdk: flutter
  flutter_localizations:
    sdk: flutter

dev_dependencies:
  flutter_test:
    sdk: flutter
  flutter_localizations:
    sdk: flutter
  intl: ^0.17.0

import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:intl/date_symbol_data_local.dart';

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  DateTime _selectedDate;

  Future<void> _selectDate() async {
    final DateTime pickedDate = await showDatePicker(
      context: context,
      initialDate: DateTime.now(),
      firstDate: DateTime(2000),
      lastDate: DateTime(2100),
    );

    if (pickedDate != null) {
      setState(() {
        _selectedDate = pickedDate;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: <Widget>[
        RaisedButton(
          onPressed: _selectDate,
          child: Text('Select Date'),
        ),
        Text(
          _selectedDate == null
              ? 'No date selected'
              : DateFormat.yMd().format(_selectedDate),
        ),
      ],
    );
  }
}