修改

lib/union/store_details_page.dart

@@ -187,9 +187,14 @@ class _StoreDetailsPage extends State<StoreDetailsPage> {
                       ),
                       onTap: () {
                         if (activity != null) {
-                          Navigator.of(context).pushNamed(
-                              '/router/union_detail_page',
-                              arguments: {"id": activity.storeId});
+                          if (widget.arguments["source"] != null
+                              && widget.arguments["source"] == activity.storeId) {
+                            Navigator.of(context).pop();
+                          } else {
+                            Navigator.of(context).pushNamed(
+                                '/router/union_detail_page',
+                                arguments: {"id": activity.storeId, "source": widget.arguments["activityId"]});
+                          }
                         }
                       },
                     ),

lib/union/union_details_page.dart

@@ -737,8 +737,13 @@ class _UnionDetailsPage extends State<UnionDetailsPage> {
         itemBuilder: (context, position) {
           return InkWell(
             onTap: () {
-              Navigator.of(context).pushNamed('/router/store_detail_page',
-                  arguments: {"activityId": activitys[position].id});
+              if (widget.arguments["source"] != null
+                && widget.arguments["source"] == activitys[position].id) {
+                Navigator.of(context).pop();
+              } else {
+                Navigator.of(context).pushNamed('/router/store_detail_page',
+                    arguments: {"activityId": activitys[position].id, "source": widget.arguments["id"]});
+              }
             },
             child: Container(
               margin: EdgeInsets.symmetric(horizontal: 5.w),