Flutter使用按键显示日期选择器

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

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Date Picker',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  void showDatePicker(BuildContext context) {
    showCupertinoModalPopup(
      context: context,
      builder: (BuildContext context) {
        return Container(
          height: 300,
          child: CupertinoDatePicker(
            mode: CupertinoDatePickerMode.date,
            onDateTimeChanged: (DateTime newDate) {
              // 处理选择的日期
              print(newDate);
            },
          ),
        );
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Date Picker'),
      ),
      body: Center(
        child: FlatButton(
          child: Text('选择日期'),
          onPressed: () {
            showDatePicker(context);
          },
        ),
      ),
    );
  }
}