pref: 优化 useEffect 依赖和清理逻辑

src/views/Community/components/DynamicNewsCard.js

@@ -1,7 +1,7 @@
 // src/views/Community/components/DynamicNewsCard.js
 // 横向滚动事件卡片组件（实时要闻·动态追踪）
 
-import React, { forwardRef, useState, useEffect, useMemo, useCallback } from 'react';
+import React, { forwardRef, useState, useEffect, useMemo, useCallback, useRef } from 'react';
 import { useDispatch, useSelector } from 'react-redux';
 import {
   Card,
@@ -72,6 +72,9 @@ const DynamicNewsCard = forwardRef(({
   // 本地状态
   const [selectedEvent, setSelectedEvent] = useState(null);
 
+  // 初始化标记 - 确保初始加载只执行一次
+  const hasInitialized = useRef(false);
+
   // 使用分页 Hook
   const {
     currentPage,
@@ -91,9 +94,10 @@ const DynamicNewsCard = forwardRef(({
     toast
   });
 
-  // 初始加载
+  // 初始加载 - 只在组件首次挂载且未初始化时执行
   useEffect(() => {
-    if (allCachedEvents.length === 0) {
+    if (!hasInitialized.current && allCachedEvents.length === 0) {
+      hasInitialized.current = true;
       dispatch(fetchDynamicNews({
         page: PAGINATION_CONFIG.INITIAL_PAGE,
         per_page: PAGINATION_CONFIG.CAROUSEL_PAGE_SIZE,
@@ -103,12 +107,27 @@ const DynamicNewsCard = forwardRef(({
     }
   }, [dispatch, allCachedEvents.length]);
 
-  // 默认选中第一个事件
+  // 默认选中第一个事件 - 只在当前选中的事件不在当前页时重置
   useEffect(() => {
-    if (currentPageEvents.length > 0 && !selectedEvent) {
+    if (currentPageEvents.length > 0) {
+      // 检查当前选中的事件是否在当前页中
+      const selectedEventInCurrentPage = currentPageEvents.find(
+        e => e.id === selectedEvent?.id
+      );
+
+      // 如果选中的事件不在当前页，则选中当前页第一个事件
+      if (!selectedEventInCurrentPage) {
         setSelectedEvent(currentPageEvents[0]);
       }
-  }, [currentPageEvents, selectedEvent]);
+    }
+  }, [currentPageEvents, selectedEvent?.id]);
+
+  // 组件卸载时清理选中状态
+  useEffect(() => {
+    return () => {
+      setSelectedEvent(null);
+    };
+  }, []);
 
   return (
     <Card ref={ref} {...rest} bg={cardBg} borderColor={borderColor} mb={4}>

src/views/Community/components/DynamicNewsCard/hooks/usePagination.js

@@ -1,7 +1,7 @@
 // src/views/Community/components/DynamicNewsCard/hooks/usePagination.js
 // 分页逻辑自定义 Hook
 
-import { useState, useMemo, useCallback } from 'react';
+import { useState, useMemo, useCallback, useRef, useEffect } from 'react';
 import { fetchDynamicNews } from '../../../../../store/slices/communityDataSlice';
 import { logger } from '../../../../../utils/logger';
 import {
@@ -22,11 +22,21 @@ import {
  * @returns {Object} 分页状态和方法
  */
 export const usePagination = ({ allCachedEvents, total, cachedCount, dispatch, toast }) => {
+  // 组件挂载状态跟踪 - 用于防止内存泄漏
+  const isMountedRef = useRef(true);
+
   // 本地状态
   const [currentPage, setCurrentPage] = useState(PAGINATION_CONFIG.INITIAL_PAGE);
   const [loadingPage, setLoadingPage] = useState(null);
   const [mode, setMode] = useState(DEFAULT_MODE);
 
+  // 组件卸载时更新挂载状态
+  useEffect(() => {
+    return () => {
+      isMountedRef.current = false;
+    };
+  }, []);
+
   // 根据模式决定每页显示数量
   const pageSize = mode === DISPLAY_MODES.CAROUSEL
     ? PAGINATION_CONFIG.CAROUSEL_PAGE_SIZE
@@ -167,6 +177,12 @@ export const usePagination = ({ allCachedEvents, total, cachedCount, dispatch, t
    * @returns {Promise<boolean>} 是否加载成功
    */
   const loadPages = useCallback(async (missingPages, targetPage, silentMode = false) => {
+    // 检查组件是否已卸载
+    if (!isMountedRef.current) {
+      logger.debug('DynamicNewsCard', '组件已卸载，取消加载');
+      return false;
+    }
+
     if (!silentMode) {
       // 显示 loading 状态
       setLoadingPage(targetPage);
@@ -182,6 +198,12 @@ export const usePagination = ({ allCachedEvents, total, cachedCount, dispatch, t
 
       // 拆分为单页请求，避免 per_page 动态值导致后端返回空数据
       for (const page of missingPages) {
+        // 每次请求前检查组件是否已卸载
+        if (!isMountedRef.current) {
+          logger.debug('DynamicNewsCard', '组件已卸载，中止加载');
+          return false;
+        }
+
         logger.debug('DynamicNewsCard', `开始加载第 ${page} 页`);
 
         await dispatch(fetchDynamicNews({
@@ -207,8 +229,8 @@ export const usePagination = ({ allCachedEvents, total, cachedCount, dispatch, t
         missingPages
       });
 
-      if (!silentMode) {
+      // 只在组件仍挂载时显示错误提示
-        // 非静默模式下显示错误提示
+      if (!silentMode && isMountedRef.current) {
         toast({
           title: '加载失败',
           description: `无法加载第 ${targetPage} 页数据，请稍后重试`,
@@ -221,8 +243,8 @@ export const usePagination = ({ allCachedEvents, total, cachedCount, dispatch, t
 
       return false;
     } finally {
-      if (!silentMode) {
+      // 只在组件仍挂载时清除加载状态
-        // 清除加载状态
+      if (!silentMode && isMountedRef.current) {
         setLoadingPage(null);
       }
     }
@@ -230,6 +252,12 @@ export const usePagination = ({ allCachedEvents, total, cachedCount, dispatch, t
 
   // 翻页处理（智能预加载）- 使用子函数重构
   const handlePageChange = useCallback(async (newPage) => {
+    // 检查组件是否已卸载
+    if (!isMountedRef.current) {
+      logger.debug('DynamicNewsCard', '组件已卸载，取消翻页');
+      return;
+    }
+
     // 🔍 诊断日志 - 记录翻页开始状态
     logger.debug('DynamicNewsCard', '开始翻页', {
       currentPage,
@@ -260,7 +288,10 @@ export const usePagination = ({ allCachedEvents, total, cachedCount, dispatch, t
         缺失页面: missingPages
       });
 
+      // 只在组件仍挂载时更新状态
+      if (isMountedRef.current) {
         setCurrentPage(newPage);
+      }
       await loadPages(missingPages, newPage, true); // 静默模式
     } else if (missingPages.length > 0 && hasMore) {
       // 场景B: 目标页未缓存，显示 loading 并等待加载完成
@@ -271,7 +302,8 @@ export const usePagination = ({ allCachedEvents, total, cachedCount, dispatch, t
       });
 
       const success = await loadPages(missingPages, newPage, false); // 非静默模式
-      if (success) {
+      // 只在加载成功且组件仍挂载时更新状态
+      if (success && isMountedRef.current) {
         setCurrentPage(newPage);
       }
     } else if (missingPages.length === 0) {
@@ -282,7 +314,10 @@ export const usePagination = ({ allCachedEvents, total, cachedCount, dispatch, t
         reason: '所有页面均已缓存'
       });
 
+      // 只在组件仍挂载时更新状态
+      if (isMountedRef.current) {
         setCurrentPage(newPage);
+      }
     } else {
       // 场景D: 意外分支（有缺失页面但 hasMore=false）
       logger.warn('DynamicNewsCard', '意外分支：有缺失页面但无法加载', {
@@ -294,6 +329,8 @@ export const usePagination = ({ allCachedEvents, total, cachedCount, dispatch, t
         cachedCount
       });
 
+      // 只在组件仍挂载时更新状态
+      if (isMountedRef.current) {
         setCurrentPage(newPage);
 
         toast({
@@ -305,6 +342,7 @@ export const usePagination = ({ allCachedEvents, total, cachedCount, dispatch, t
           position: 'top'
         });
       }
+    }
   }, [
     currentPage,
     pageSize,