添加此库Flutter WebView

import 'package:webview_flutter/webview_flutter.dart';

return Scaffold(
      appBar: AppBar(
        title: const Text('Flutter WebView example'),
      ),
      body: const WebView(
        initialUrl: 'https://flutter.io',
        javascriptMode: JavascriptMode.unrestricted,
      ),
    );

如果你想不按任何按钮直接打开你想要的网站，你应该给予初始URL.但你应该nagivate.从其他页面推到这里.它是这样的;

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

class WebViewExample extends StatefulWidget {

  @override
  WebViewExampleState createState() => WebViewExampleState();
}

class WebViewExampleState extends State<WebViewExample> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("webview"),
      ),
      body: WebView(
        initialUrl: "https://www.google.com/",
        javascriptMode: JavascriptMode.unrestricted,
      ),
    );
  }
}

您可以使用此更新后的webview小部件是不存在的

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

class Shop extends StatefulWidget {
  const Shop({super.key});

  @override
  State<Shop> createState() => _ShopState();
 }

class _ShopState extends State<Shop> {
  late final WebViewController _controller;
   @override
   void initState() {
    _controller = WebViewController()
     ..loadRequest(
       Uri.parse('https://url'),
        );
     super.initState();
     }

   @override
  Widget build(BuildContext context) {
    return Scaffold(
    
    body: SafeArea(child: WebViewWidget(controller: _controller))
    
    );
 }
}