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lib/03/02/main.dart

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+import 'package:flutter/material.dart';
+import 'pages/color_add_page.dart';
+import '../../common/pages/stl_color_page.dart';
+import 'pages/empty_page.dart';
+import 'pages/home_page.dart';
+
+void main() {
+  runApp(const MyApp());
+}
+
+class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Flutter Demo',
+      debugShowCheckedModeBanner: false,
+      theme: ThemeData(
+        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
+        useMaterial3: true,
+      ),
+      routes: routeMap,
+      // initialRoute: '/add_color',
+      onUnknownRoute: _onUnknownRoute,
+      onGenerateRoute: _onGenerateRoute,
+    );
+  }
+
+  /// 路由映射 [字符串 --> 组件构造器]
+  Map<String, WidgetBuilder> get routeMap => {
+        '/': (ctx) => const HomePage(),
+        '/add_color': (ctx) => const ColorAddPage(),
+      };
+
+  /// 根据路由配置 [settings] 创建路由
+  Route? _onGenerateRoute(RouteSettings settings) {
+    String? name = settings.name;
+    Widget? child;
+    if (name == '/color_detail') {
+      Color color = settings.arguments as Color;
+      child = StlColorPage(color: color);
+    }
+
+    if (child != null) {
+      return MaterialPageRoute(
+        builder: (ctx) => child!,
+        settings: settings,
+      );
+    }
+    return null;
+  }
+
+  Route? _onUnknownRoute(RouteSettings settings) {
+    return MaterialPageRoute(
+      builder: (ctx) => const EmptyPage(),
+      settings: settings,
+    );
+  }
+}