feat: 优化视频专区列表布局与沉浸体验

吴启风
1 parent 7e98b732
Showing 1 changed file with 118 additions and 78 deletions
lib/pages/video/zone/video_zone_page.dart
+import 'dart:async';
+
 import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
 import 'package:wow_english/common/dialogs/show_dialog.dart';
 import 'package:wow_english/common/request/dao/video_dao.dart';
@@ -21,62 +24,95 @@ class _VideoZonePageState extends State&lt;VideoZonePage&gt; {
   @override
   void initState() {
     super.initState();
+    unawaited(
+      SystemChrome.setEnabledSystemUIMode(SystemUiMode.immersiveSticky),
+    );
     _itemsFuture = VideoDao.list();
   }
  
+  @override
+  void dispose() {
+    unawaited(
+      SystemChrome.setEnabledSystemUIMode(SystemUiMode.immersiveSticky),
+    );
+    super.dispose();
+  }
+
   void _reload() {
-    setState(() => _itemsFuture = VideoDao.list());
+    setState(() {
+      _itemsFuture = VideoDao.list();
+    });
   }
  
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
-      backgroundColor: Colors.white,
-      appBar: const WEAppBar(
-        titleText: '视频专区',
-        centerTitle: false,
-      ),
-      body: FutureBuilder<List<VideoZoneItem>>(
-        future: _itemsFuture,
-        builder: (context, snapshot) {
-          if (snapshot.connectionState == ConnectionState.waiting) {
-            return const Center(child: CircularProgressIndicator());
-          }
-          if (snapshot.hasError) {
-            return _VideoLoadError(onRetry: _reload);
-          }
-          final items = snapshot.data ?? const <VideoZoneItem>[];
-          if (items.isEmpty) {
-            return const Center(
-              child: Text(
-                '暂无视频',
-                style: TextStyle(color: Color(0xFF999999), fontSize: 18),
+    return MediaQuery.removePadding(
+      context: context,
+      removeTop: true,
+      child: Scaffold(
+        backgroundColor: Colors.white,
+        appBar: const WEAppBar(
+          titleText: '视频专区',
+          centerTitle: false,
+        ),
+        body: FutureBuilder<List<VideoZoneItem>>(
+          future: _itemsFuture,
+          builder: (context, snapshot) {
+            if (snapshot.connectionState == ConnectionState.waiting) {
+              return const Center(child: CircularProgressIndicator());
+            }
+            if (snapshot.hasError) {
+              return _VideoLoadError(onRetry: _reload);
+            }
+            final items = snapshot.data ?? const <VideoZoneItem>[];
+            if (items.isEmpty) {
+              return const Center(
+                child: Text(
+                  '暂无视频',
+                  style: TextStyle(color: Color(0xFF999999), fontSize: 18),
+                ),
+              );
+            }
+            return RefreshIndicator(
+              onRefresh: () async {
+                final future = VideoDao.list();
+                setState(() => _itemsFuture = future);
+                await future;
+              },
+              child: LayoutBuilder(
+                builder: (context, constraints) {
+                  final horizontalPadding = 30.w;
+                  final crossAxisSpacing = 12.w;
+                  final cardWidth = (constraints.maxWidth -
+                          horizontalPadding * 2 -
+                          crossAxisSpacing * 2) /
+                      3;
+                  final cardHeight = cardWidth * 9 / 16 + 5.h + 24.h;
+                  return GridView.builder(
+                    physics: const AlwaysScrollableScrollPhysics(),
+                    padding: EdgeInsets.fromLTRB(
+                      horizontalPadding,
+                      10.h,
+                      horizontalPadding,
+                      16.h,
+                    ),
+                    gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
+                      crossAxisCount: 3,
+                      mainAxisSpacing: 14.h,
+                      crossAxisSpacing: crossAxisSpacing,
+                      mainAxisExtent: cardHeight,
+                    ),
+                    itemCount: items.length,
+                    itemBuilder: (context, index) => _VideoCard(
+                      item: items[index],
+                      onTap: () => _openVideo(items, index),
+                    ),
+                  );
+                },
               ),
             );
-          }
-          return RefreshIndicator(
-            onRefresh: () async {
-              final future = VideoDao.list();
-              setState(() => _itemsFuture = future);
-              await future;
-            },
-            child: GridView.builder(
-              physics: const AlwaysScrollableScrollPhysics(),
-              padding: EdgeInsets.fromLTRB(14.w, 10.h, 14.w, 16.h),
-              gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
-                crossAxisCount: 4,
-                mainAxisSpacing: 14.h,
-                crossAxisSpacing: 12.w,
-                childAspectRatio: 1.55,
-              ),
-              itemCount: items.length,
-              itemBuilder: (context, index) => _VideoCard(
-                item: items[index],
-                onTap: () => _openVideo(items, index),
-              ),
-            ),
-          );
-        },
+          },
+        ),
       ),
     );
   }
@@ -99,7 +135,13 @@ class _VideoZonePageState extends State&lt;VideoZonePage&gt; {
             .toList(),
         'initialVideoId': item.id,
       },
-    ).then((_) => _reload());
+    ).then((_) {
+      if (!mounted) return;
+      unawaited(
+        SystemChrome.setEnabledSystemUIMode(SystemUiMode.immersiveSticky),
+      );
+      _reload();
+    });
   }
 }
  
@@ -140,43 +182,41 @@ class _VideoCard extends StatelessWidget {
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
-          Expanded(
+          AspectRatio(
+            aspectRatio: 16 / 9,
             child: ClipRRect(
               borderRadius: BorderRadius.circular(8.r),
-              child: Stack(
-                fit: StackFit.expand,
-                children: [
-                  CachedNetworkImage(
-                    imageUrl: item.coverUrl,
-                    fit: BoxFit.cover,
-                    placeholder: (_, __) => const ColoredBox(
-                      color: Color(0xFFF2F2F2),
-                      child: Center(child: CircularProgressIndicator()),
-                    ),
-                    errorWidget: (_, __, ___) => const ColoredBox(
-                      color: Color(0xFFF2F2F2),
-                      child: Icon(Icons.broken_image_outlined,
-                          color: Color(0xFFAAAAAA)),
-                    ),
-                  ),
-                  const Center(
-                    child: Icon(Icons.play_circle_fill,
-                        size: 42, color: Colors.white),
-                  ),
-                ],
+              child: CachedNetworkImage(
+                imageUrl: item.coverUrl,
+                fit: BoxFit.cover,
+                placeholder: (_, __) => const ColoredBox(
+                  color: Color(0xFFF2F2F2),
+                  child: Center(child: CircularProgressIndicator()),
+                ),
+                errorWidget: (_, __, ___) => const ColoredBox(
+                  color: Color(0xFFF2F2F2),
+                  child: Icon(Icons.broken_image_outlined,
+                      color: Color(0xFFAAAAAA)),
+                ),
               ),
             ),
           ),
           SizedBox(height: 5.h),
-          Text(
-            item.title,
-            maxLines: 1,
-            overflow: TextOverflow.ellipsis,
-            style: TextStyle(
-              color: const Color(0xFF222222),
-              fontFamily: null,
-              fontSize: 17.sp,
-              fontWeight: FontWeight.w500,
+          SizedBox(
+            height: 24.h,
+            child: Align(
+              alignment: Alignment.centerLeft,
+              child: Text(
+                item.title,
+                maxLines: 1,
+                overflow: TextOverflow.ellipsis,
+                style: TextStyle(
+                  color: const Color(0xFF222222),
+                  fontFamily: null,
+                  fontSize: 17.sp,
+                  fontWeight: FontWeight.w500,
+                ),
+              ),
             ),
           ),
         ],