feat: 动态页图片、图片预览页无障碍适配

lib/pages/dynamics/widgets/content_panel.dart

@@ -59,7 +59,9 @@ class _ContentState extends State<Content> {
                   (pictureItem.height != null && pictureItem.width != null
                       ? pictureItem.height! / pictureItem.width!
                       : 1);
-              return GestureDetector(
+              return Semantics(
+                  label: '图片1,共1张',
+                  child: GestureDetector(
                     onTap: () {
                       showDialog(
                         useSafeArea: false,
@@ -92,7 +94,7 @@ class _ContentState extends State<Content> {
                                 : const SizedBox(),
                           ],
                         )),
-              );
+                  ));
             },
           ),
         ),
@@ -106,7 +108,9 @@ class _ContentState extends State<Content> {
           LayoutBuilder(
             builder: (context, BoxConstraints box) {
               double maxWidth = box.maxWidth.truncateToDouble();
-              return GestureDetector(
+              return Semantics(
+                  label: '图片${i + 1},共$len张',
+                  child: GestureDetector(
                     onTap: () {
                       showDialog(
                         useSafeArea: false,
@@ -123,7 +127,7 @@ class _ContentState extends State<Content> {
                       origAspectRatio:
                           pics[i].width!.toInt() / pics[i].height!.toInt(),
                     ),
-              );
+                  ));
             },
           ),
         );
@@ -201,7 +205,7 @@ class _ContentState extends State<Content> {
           if (hasPics) ...[
             Text.rich(
               picsNodes(),
-              semanticsLabel: '动态图片',
+              // semanticsLabel: '动态图片',
             ),
           ]
         ],

lib/pages/preview/view.dart

@@ -135,14 +135,17 @@ class _ImagePreviewState extends State<ImagePreview>
       ),
       body: Stack(
         children: [
-          GestureDetector(
+          Semantics(
+            label: '双指缩放、长按保存、左右滑动切换图片',
+            child: GestureDetector(
               onLongPress: () => onOpenMenu(),
               child: ExtendedImageGesturePageView.builder(
                 controller: ExtendedPageController(
                   initialPage: _previewController.initialPage.value,
                   pageSpacing: 0,
                 ),
-              onPageChanged: (int index) => _previewController.onChange(index),
+                onPageChanged: (int index) =>
+                    _previewController.onChange(index),
                 canScrollPage: (GestureDetails? gestureDetails) =>
                     gestureDetails!.totalScale! <= 1.0,
                 itemCount: widget.imgList!.length,
@@ -234,6 +237,7 @@ class _ImagePreviewState extends State<ImagePreview>
                 },
               ),
             ),
+          ),
           Positioned(
             left: 0,
             right: 0,