升级flutter_inappwebview后出现命名参数未定义错误，求迁移解决方案

核心原因 #

你遇到的参数未定义报错，是因为升级到了flutter_inappwebview 6.x及以上的大版本，该版本对原有API做了批量不兼容更新，对应修改规则如下：

各报错参数替换规则 #

• initialHeadersRequest：已废弃，请求头直接配置到URLRequest的headers属性中即可
• initialOptions：重命名为initialSettings，配套的InAppWebViewGroupOptions改为InAppWebViewSettings
• debuggingEnabled：重命名为isInspectable
• onWebViewCreated：重命名为onControllerReceived
• onLoadStart：重命名为onPageStarted，回调参数url类型从String调整为Uri?
• onLoadStop：重命名为onPageFinished，回调参数url类型从String调整为Uri?

修改后完整代码 #

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter_inappwebview/flutter_inappwebview.dart';
import 'package:gec_app/Menu.dart';

Future main() async {
  WidgetsFlutterBinding.ensureInitialized();
}

class AboutUs extends StatefulWidget {
  @override
  _AboutUsState createState() => new _AboutUsState();
}

class _AboutUsState extends State<AboutUs> {
  InAppWebViewController? webView;

  @override
  void initState() {
    super.initState();
  }

  @override
  void dispose() {
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
            title: const Text('Visit Us'),
            leading: new IconButton(
                icon: new Icon(Icons.arrow_back),
                onPressed: () {
                  Navigator.push(context,
                      MaterialPageRoute(builder: (context) => HomeScreen()));
                })),
        body: Container(
            child: Column(children: <Widget>[
              Expanded(
                  child: InAppWebView(
                    initialUrlRequest: URLRequest(
                      url: Uri.parse("https://www.gecgh.org/"),
                      headers: {},
                    ),
                    initialSettings: InAppWebViewSettings(
                      isInspectable: true,
                      preferredContentMode: UserPreferredContentMode.DESKTOP,
                    ),
                    onControllerReceived: (InAppWebViewController controller) {
                      webView = controller;
                    },
                    onPageStarted: (InAppWebViewController controller, Uri? url) {},
                    onPageFinished: (InAppWebViewController controller, Uri? url) async {},
                  ))
            ])),
      ),
    );
  }
}

内容的提问来源于stack exchange，提问作者Manuel