From 9f7301305ef1a5b7a042489118e0569ccd4dafe3 Mon Sep 17 00:00:00 2001
From: Vicky <10212746+haifeng-jiang@user.noreply.gitee.com>
Date: Thu, 29 Oct 2026 11:16:13 +0800
Subject: [PATCH] =?UTF-8?q?perf(following):=20=E8=BF=BD=E5=89=A7=E9=A1=B5?=
 =?UTF-8?q?=E4=B8=8D=E5=8F=AF=E8=A7=81=E6=97=B6=E4=B8=8D=E5=86=8D=E6=8F=90?=
 =?UTF-8?q?=E5=89=8D=E6=8B=89=E8=A7=82=E7=9C=8B=E5=8E=86=E5=8F=B2?=
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首页用 IndexedStack 常驻四个 tab，追剧页一启动就会发一次观看历史请求，和首页 feed 抢网络；
改为切到该 tab 时再加载，收藏列表也只在首次可见且为空时补拉。
---
 lib/pages/following/following_page.dart | 19 +++++++++++++++----
 test/following/following_page_test.dart | 23 +++++++++++++++++++++++
 2 files changed, 38 insertions(+), 4 deletions(-)

diff --git a/lib/pages/following/following_page.dart b/lib/pages/following/following_page.dart
index b467784..d099fb9 100644
--- a/lib/pages/following/following_page.dart
+++ b/lib/pages/following/following_page.dart
@@ -69,10 +69,14 @@ class _FollowingPageState extends State<FollowingPage> {
       history: context.read<WatchHistoryRepository>(),
       catalog: context.read<CatalogRepository>(),
     );
-    unawaited(_history.load());
-    WidgetsBinding.instance.addPostFrameCallback((_) {
-      if (mounted) unawaited(widget.favoriteController.load());
-    });
+    // IndexedStack 启动时就会建好本页：不可见时先不拉数据，等切到本 tab 再加载，
+    // 免得冷启动和首页 feed 抢网络。
+    if (widget.visible) {
+      unawaited(_history.load());
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        if (mounted) unawaited(widget.favoriteController.load());
+      });
+    }
   }
 
   void _onAuthChanged() {
@@ -107,6 +111,13 @@ class _FollowingPageState extends State<FollowingPage> {
     super.didUpdateWidget(oldWidget);
     if (!oldWidget.visible && widget.visible) {
       unawaited(_history.load());
+      // 启动时本页不可见，收藏没在这里拉过；首次可见时补齐（已有数据就不重复请求）。
+      // 放在帧后，避免构建期间触发 controller 通知。
+      if (widget.favoriteController.cards.isEmpty) {
+        WidgetsBinding.instance.addPostFrameCallback((_) {
+          if (mounted) unawaited(widget.favoriteController.load());
+        });
+      }
     }
     if (oldWidget.historyRequest == widget.historyRequest) return;
     WidgetsBinding.instance.addPostFrameCallback((_) {
diff --git a/test/following/following_page_test.dart b/test/following/following_page_test.dart
index ef5db17..5acbf0e 100644
--- a/test/following/following_page_test.dart
+++ b/test/following/following_page_test.dart
@@ -23,6 +23,29 @@ import '../support/fake_interaction_repositories.dart';
 import '../support/widget_player.dart';
 
 void main() {
+  testWidgets('should_defer_watch_history_until_following_tab_is_opened', (
+    tester,
+  ) async {
+    SharedPreferencesAsyncPlatform.instance =
+        InMemorySharedPreferencesAsync.empty();
+    final catalog = FakeCatalogRepository();
+    final history = _IdentityWatchHistoryRepository(
+      device: [_historyProgress('the-signal-demo', 'Device history')],
+      account: const [],
+    );
+    await tester.pumpWidget(_app(catalog: catalog, history: history));
+    await tester.pumpAndSettle();
+
+    // 首页默认停在推荐 tab：追剧页虽在 IndexedStack 里，也不该提前拉观看历史。
+    // 启动时只有「我的」页会拉一次，追剧页若也拉就会变成 2。
+    expect(history.recentCalls, 1);
+
+    await tester.tap(find.byKey(const Key('tab-follow')));
+    await tester.pumpAndSettle();
+
+    expect(history.recentCalls, greaterThan(0));
+  });
+
   testWidgets('should_render_following_tabs_grid_and_edit_actions', (
     tester,
   ) async {