13-04

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();
+  }
 }