13-04

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

@@ -7,7 +7,7 @@ import '../page_b.dart';
 import '../page_c.dart';
 import '../home_page.dart';
 
-class AppRouterDelegate extends RouterDelegate with ChangeNotifier{
+class AppRouterDelegate extends RouterDelegate<Object> with ChangeNotifier{
 
   List<String> _value = ['/'];
 
@@ -35,13 +35,11 @@ class AppRouterDelegate extends RouterDelegate with ChangeNotifier{
 
   @override
   Future<bool> popRoute() async{
-    print('================');
+    print('=======popRoute=========');
     return true;
   }
 
   bool _onPopPage(Route route, result) {
-    _value = List.of(_value)..removeLast();
-    notifyListeners();
     return route.didPop(result);
   }
 

lib/13/01/pages/page_a.dart

@@ -13,6 +13,7 @@ class PageA extends StatelessWidget {
         appBar: AppBar(
           title: const Text('A 界面'),
           backgroundColor: bgColor,
+          leading: BackButton(onPressed: _pop),
         ),
         body: Center(
           child: ElevatedButton(
@@ -26,4 +27,7 @@ class PageA extends StatelessWidget {
     router.value = ['/', 'a', 'b'];
   }
 
+  void _pop() {
+    router.value = List.of(router.value)..removeLast();
+  }
 }

lib/13/01/pages/page_b.dart

@@ -15,7 +15,7 @@ class PageB extends StatelessWidget {
         appBar: AppBar(
           title: const Text('B 界面'),
           backgroundColor: bgColor,
-
+          leading: BackButton(onPressed: _pop),
         ),
         body: Center(
           child: ElevatedButton(
@@ -29,4 +29,7 @@ class PageB extends StatelessWidget {
     router.value = ['/','a','b','c'];
   }
 
+  void _pop() {
+    router.value = List.of(router.value)..removeLast();
+  }
 }

lib/13/01/pages/page_c.dart

@@ -14,9 +14,14 @@ class PageC extends StatelessWidget {
         appBar: AppBar(
           title: const Text('C 界面'),
           backgroundColor: bgColor,
+          leading: BackButton(onPressed: _pop),
         ),
         body: Center(
           child: Text('到达终点'),
         ));
   }
+
+  void _pop() {
+    router.value = List.of(router.value)..removeLast();
+  }
 }