flutter2.x报错解决type (RouteSettings) =＞ Route＜dynamic＞ is not a subtype of type (RouteSettings) =＞ Rou

flutter2.x报错解决type (RouteSettings) => Route <dynamic>? is not a subtype of type (RouteSettings) => Route <dynemic> of function result

原有代码–main.dart

import 'package:flutter/material.dart';
import 'pages/tabs/Tabs.dart';
import 'routers/router.dart';
void main() {runApp(MyApp());
}
// 输入stf  有状态组件
// stss 无状态组件
class MyApp extends StatefulWidget {const MyApp({ Key? key }) : super(key: key);@override_MyAppState createState() => _MyAppState();
}class _MyAppState extends State<MyApp> {@overrideWidget build(BuildContext context) {return MaterialApp(// home: Tabs()initialRoute: '/', // 注意观察--问题就出在函数类型声明方面onGenerateRoute: onGenerateRoute, // 注意观察--问题就出在函数类型声明方面);}
}

原有代码–router.dart

    import 'package:flutter/material.dart';import '../pages/tabs/Tabs.dart';import '../pages/test/Search.dart';// 配置路由路径var router = {'/': (context, { arguments }) => Tabs(arguments: arguments), // 使用arguments传递参数'/search': (context) => SearchPage()};// onGenerateRoute配置// 注意观察--问题就出在函数类型声明方面final onGenerateRoute = (RouteSettings settings) {final String ? name = settings.name;final Function pageContentBuilder = router[name] as Function;if (pageContentBuilder != null) {if (settings.arguments != null) {final Route route = MaterialPageRoute(builder: (context) =>pageContentBuilder(context, arguments: settings.arguments));return route;} else {final Route route =MaterialPageRoute(builder: (context) => pageContentBuilder(context));return route;}}};

解决方案–现有代码–修改类型声明

final Map<String, WidgetBuilder> routes = {'/': (context) => NewPage(),'/search': (context) => ParamPage(),};Route<dynamic> _onGenerateRoute(RouteSettings settings) {//   return MaterialPageRoute(builder: (context) {//     // 如果访问的路由页需要登录，但当前未登录，则直接返回登录页路由，//     // 引导用户登录；其它情况则正常打开路由。//     // 统一处理// })final String name = settings.name;final Function pageContentBuilder = routes[name];print('到1');if (settings.arguments != null) {print('到2');final Route route = MaterialPageRoute(builder: (context) => NewPage(),);return route;} else {print('到3');final Route route = MaterialPageRoute(builder: (context) {return ParamPage(text: ModalRoute.of(context).settings.arguments);},);return route;}}

解决思路，点击main.dart中的 onGenerateRoute: _onGenerateRoute,跳转过去看一下其变量类型，然后根据类型进行声明

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flutter2.x报错解决type (RouteSettings) =＞ Route＜dynamic＞ is not a subtype of type (RouteSettings) =＞ Rou

flutter2.x报错解决type (RouteSettings) => Route <dynamic>? is not a subtype of type (RouteSettings) => Route <dynemic> of function result

原有代码–main.dart

原有代码–router.dart

解决方案–现有代码–修改类型声明

解决思路，点击main.dart中的 onGenerateRoute: _onGenerateRoute,跳转过去看一下其变量类型，然后根据类型进行声明

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