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lib/13/01____/pages/app/app_router_delegate.dart

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+import 'package:flutter/material.dart';
+import '../page_a.dart';
+import '../page_b.dart';
+import '../page_c.dart';
+import '../home_page.dart';
+
+class AppRouterDelegate extends RouterDelegate<String> with ChangeNotifier, PopNavigatorRouterDelegateMixin {
+
+  AppRouterDelegate({String initial = '/'}):_path=initial;
+
+  String _path;
+
+  String get path=>  _path;
+
+  void go(String path){
+    _path = path;
+    notifyListeners();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Navigator(
+      onPopPage: _onPopPage,
+      pages: parserConfig(_path).map((e) => _pageMap[e]!).toList(),
+    );
+  }
+
+  final Map<String, Page> _pageMap = const {
+    '/': MaterialPage(child: HomePage()),
+    'a': MaterialPage(child: PageA()),
+    'b': MaterialPage(child: PageB()),
+    'c': MaterialPage(child: PageC()),
+  };
+
+  Widget buildNavigatorByConfig(String path) {
+    return Navigator(
+      onPopPage: _onPopPage,
+      pages: parserConfig(path).map((e) => _pageMap[e]!).toList(),
+    );
+  }
+
+  bool _onPopPage(Route route, result) {
+    if(path.length>1){
+      int last = path.lastIndexOf('/');
+      _path = path.substring(0,last);
+      if(_path.isEmpty) _path = '/';
+      notifyListeners();
+    }
+    return route.didPop(result);
+  }
+
+  @override
+  GlobalKey<NavigatorState>? navigatorKey = GlobalKey<NavigatorState>();
+
+
+  @override
+  Future<void> setNewRoutePath(String configuration) async{
+    _path = configuration;
+  }
+
+  List<String> parserConfig(String path){
+    /// 例: /a/b/c  进栈 /,a,b,c 界面
+    List<String> result = ['/'];
+    if(path.startsWith('/')){
+      path = path.substring(1);
+      if(path.isNotEmpty){
+        List<String> parts = path.split('/');
+        result.addAll(parts);
+      }
+    }
+    return result;
+  }
+}