flutter制作具有自定义导航栏的渐进式 Web 应用程序

import 'package:flutter/material.dart';
import 'package:flutter_web/chrome.dart' as chrome;
 
void main() {
  runApp(MyApp());
}
 
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Custom Navigation Bar',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Custom Navigation Bar'),
    );
  }
}
 
class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
 
  final String title;
 
  @override
  _MyHomePageState createState() => _MyHomePageState();
}
 
class _MyHomePageState extends State<MyHomePage> {
  @override
  void initState() {
    super.initState();
    // 设置自定义导航栏
    chrome.setBrowserStyle({
      'textColor': '#FFFFFF',
      'contextMenuColor': '#FFFFFF',
      'loadingBarColor': '#009688',
      'accentColor': '#009688',
    });
  }
 
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'This is a progressive web app with a custom navigation bar.',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
    );
  }
}

这段代码使用了Flutter框架创建了一个有自定义导航栏的渐进式Web应用程序。在initState方法中，我们调用了chrome.setBrowserStyle方法来设置自定义的浏览器样式。这个例子展示了如何使用Flutter为Web应用程序定制浏览器的外观和感觉。