s

wallpaper/lib/pages/imgscanpage/imgscanpage_controller.dart

@@ -2,10 +2,13 @@ import 'package:get/get.dart';
 import 'package:get/get_rx/get_rx.dart';
 import 'package:wallpaper/models/imgnetodel.dart';
 import 'package:wallpaper/utils/downloadmanager.dart';
+import 'dart:async';
 
 class ImgScanPageController extends GetxController {
   late NetImgCategory dataModel;
   RxInt currentIndex = RxInt(0);
+  RxInt showAppbar = RxInt(0);//控制appbar显示....
+  Timer? _timer;
 
   @override
   void onInit(){
@@ -14,10 +17,36 @@ class ImgScanPageController extends GetxController {
       dataModel = Get.arguments["dataModel"];
   }
 
+  @override
+  void onClose() {
+    cancelTimer();
+    super.onClose();
+
+  }
+
+  void cancelTimer() {
+    if (_timer != null) {
+        _timer!.cancel();
+        _timer = null;
+      }
+  }
+
   Future < void> downloadImg() async {
     String urlStr = dataModel.data![currentIndex.value].original!;
         await DownloadManager.downloadImgWithUrl(urlStr);
         //提示框
         //....已下载
   }
+
+  void showAppbarAction(){
+      showAppbar.value = 1;
+      cancelTimer();
+
+      const oneSec = Duration(seconds: 3);
+      _timer = Timer.periodic(oneSec, (Timer timer) {
+        timer.cancel();
+        _timer = null;
+        showAppbar.value = 0;
+      });
+  }
 }

wallpaper/lib/pages/imgscanpage/imgscanpage_view.dart

@@ -12,22 +12,22 @@ class ImgScanPageView extends GetView<ImgScanPageController> {
   // final int currentIndex;
 
   // const ImgScanPageView({super.key,required this.dataModel,required this.currentIndex});
-
+  
   @override 
   Widget build(BuildContext context) {
     return Scaffold(
       extendBodyBehindAppBar: true,
       backgroundColor: Colors.black,
-      appBar: PreferredSize(
+      appBar:PreferredSize(
-        preferredSize: const Size.fromHeight(44),
+              preferredSize: const Size.fromHeight(44),
-        child: AppBar(
+              child: Obx(() => controller.showAppbar.value == 0 ? Text("") :AppBar(
-        centerTitle: true,
+              centerTitle: true,
-        title: const Text("查看大图"),
+              title: const Text("查看大图"),
-        
+              
-        backgroundColor: Colors.transparent,
+              backgroundColor: Colors.transparent,
-        foregroundColor: Colors.white,
+              foregroundColor: Colors.white,
-      ),
+            )),
-      ),
+        ),
       body: Stack(
         children: [
           PhotoViewGallery.builder(
@@ -39,7 +39,7 @@ class ImgScanPageView extends GetView<ImgScanPageController> {
                         minScale: PhotoViewComputedScale.contained*0.4,
                         maxScale: PhotoViewComputedScale.contained * 4,
                         onTapDown: (context, details, controllerValue) {
-                          print("touch down...");
+                          controller.showAppbarAction();
                         },
                         // heroAttributes: PhotoViewHeroAttributes(tag: galleryItems[index].id),
                       );