mod: 依赖升级

lib/pages/history_search/view.dart

@@ -131,7 +131,6 @@ class _HistorySearchPageState extends State<HistorySearchPage> {
                                             onChoose: null,
                                             onUpdateMultiple: () => null,
                                           );
-                                          ;
                                         }
                                       },
                                     )

lib/pages/main/view.dart

@@ -113,8 +113,8 @@ class _MainAppState extends State<MainApp> with SingleTickerProviderStateMixin {
         MediaQuery.of(context).size.width * 9 / 16;
     localCache.put('sheetHeight', sheetHeight);
     localCache.put('statusBarHeight', statusBarHeight);
-    return WillPopScope(
-      onWillPop: () => _mainController.onBackPressed(context),
+    return PopScope(
+      onPopInvoked: (bool status) => _mainController.onBackPressed(context),
       child: Scaffold(
         extendBody: true,
         body: FadeTransition(

lib/pages/preview/view.dart

@@ -159,7 +159,6 @@ class _ImagePreviewState extends State<ImagePreview>
                     _previewController.onChange(index),
                 canScrollPage: (GestureDetails? gestureDetails) =>
                     gestureDetails!.totalScale! <= 1.0,
-                preloadPagesCount: 2,
                 itemCount: widget.imgList!.length,
                 itemBuilder: (BuildContext context, int index) {
                   return ExtendedImage.network(