修复切换tabbar导致用户状态丢失的问题

lib/pages/assistant/view.dart

@@ -9,7 +9,7 @@ class AssistantPage extends GetView<AssistantController> {
 
   // 主视图
   Widget _buildView() {
-    return GridWidget();
+    return _AssistantPage();
   }
 
   @override
@@ -29,3 +29,20 @@ class AssistantPage extends GetView<AssistantController> {
     );
   }
 }
+
+class _AssistantPage extends StatefulWidget {
+  const _AssistantPage({Key? key}) : super(key: key);
+
+  @override
+  State<_AssistantPage> createState() => _AssistantPageState();
+}
+
+class _AssistantPageState extends State<_AssistantPage> with AutomaticKeepAliveClientMixin{
+  @override
+  // TODO: implement wantKeepAlive
+  bool get wantKeepAlive => true;
+  @override
+  Widget build(BuildContext context) {
+    return  GridWidget();
+  }
+}

lib/pages/creation/view.dart

@@ -9,7 +9,7 @@ class CreationPage extends GetView<CreationController> {
 
   // 主视图
   Widget _buildView() {
-    return GridWidget();
+    return const _InnerCreationPage();
     // return Obx(() => Center(
     //       child: InkWell(
     //         onTap: () => controller.increment(),
@@ -40,3 +40,23 @@ class CreationPage extends GetView<CreationController> {
     );
   }
 }
+
+class _InnerCreationPage extends StatefulWidget {
+  const _InnerCreationPage({Key? key}) : super(key: key);
+
+  @override
+  State<_InnerCreationPage> createState() => _InnerCreationPageState();
+}
+
+class _InnerCreationPageState extends State<_InnerCreationPage>
+    with AutomaticKeepAliveClientMixin {
+
+  /// 防止每次切换之后自动滑动到顶部
+  @override
+  bool get wantKeepAlive => true;
+
+  @override
+  Widget build(BuildContext context) {
+    return GridWidget();
+  }
+}