完成值绑定

wallpaper/lib/pages/tabarpage/tabarpage_controller.dart

@@ -1,15 +1,11 @@
 import 'package:get/get.dart';
 
 class TabbarPageController extends GetxController {
-  // TabbarPageController
-  @override
-  void onInit(){
-    super.onInit();
-  }
+  var currentIdenx = 0.obs;
 
 
   void onItemTapped(int index) {
-    
+      currentIdenx.value = index;
   }
 
 }

wallpaper/lib/pages/tabarpage/tabarpage_view.dart

@@ -6,25 +6,27 @@ import 'package:wallpaper/pages/homePage/homePage_view.dart';
 import 'package:wallpaper/pages/downloadpage/downloadpage_view.dart';
 import 'package:wallpaper/pages/collectionpage/collectionpage_view.dart';
 import 'package:wallpaper/pages/mypage/mypage_view.dart';
-class TabbarPageView extends GetView {
-  const TabbarPageView({super.key});
+
+import 'tabarpage_controller.dart';
+
+class TabbarPageView extends GetView  <TabbarPageController>{
+   const TabbarPageView({super.key});
 
   @override 
   Widget build(BuildContext context) {
     final List<Widget> childPageList = getPages();
     final List<BottomNavigationBarItem> listBarItems = getTabarItem();
-
     return Scaffold(
-      bottomNavigationBar: BottomNavigationBar(
+      bottomNavigationBar:Obx(() => BottomNavigationBar(
         items: listBarItems,
         unselectedItemColor:Colors.grey,
         selectedItemColor: Colors.orange,
         type: BottomNavigationBarType.fixed,
         selectedFontSize: 14,
         unselectedFontSize: 14,
-        currentIndex: 0,
-
-      ),
+        currentIndex: controller.currentIdenx.value,
+        onTap: controller.onItemTapped,
+      )),
       body: childPageList[0],
     );
   }
@@ -48,7 +50,7 @@ class TabbarPageView extends GetView {
 
   //返回每个tabitem对应控制器视图,必须一一对应
   List<Widget> getPages(){
-    return [HomePageView(),CollectionPageView(),DownloadPageView(),MyPageView(),];
+    return [const HomePageView(),const CollectionPageView(),const DownloadPageView(),const MyPageView(),];
   }