一、核心知识点:商品列表组件 完整核心用法

1. 用到的纯内置组件与 API

核心组件/API 作用说明 鸿蒙适配特性
View 核心容器组件,实现所有「列表容器、商品卡片、筛选容器」 ✅ 鸿蒙端样式渲染无错位,宽高、圆角、背景色属性完美生效
Text 文本组件,显示商品名称、价格、描述等信息 ✅ 鸿蒙端文本渲染正常,支持多行文本、省略号
Image 图片组件,显示商品图片,支持网络图片和本地图片 ✅ 鸿蒙端图片加载正常,支持缓存和占位图
FlatList 高性能列表组件,实现商品列表渲染 ✅ 鸿蒙端列表渲染性能优秀,支持虚拟滚动
TouchableOpacity 触摸反馈组件,实现商品点击交互 ✅ 鸿蒙端触摸响应正常,交互流畅
TextInput 输入框组件,实现搜索功能 ✅ 鸿蒙端输入体验流畅,支持键盘交互
ScrollView 滚动容器组件,实现横向筛选选项 ✅ 鸿蒙端横向滚动流畅,无卡顿
StyleSheet 原生样式管理,编写鸿蒙端最优的列表样式:卡片间距、圆角、阴影,无任何不兼容CSS属性 ✅ 贴合鸿蒙官方视觉设计规范,颜色、圆角、间距均为真机实测最优值
useState React 原生钩子,管理商品数据、搜索关键词、筛选状态 ✅ 状态管理精准,无性能问题
useEffect React 原生钩子,管理数据加载和副作用 ✅ 副作用管理精准,无内存泄漏
useCallback React 原生钩子,优化回调函数 ✅ 回调函数优化精准,无性能问题
useMemo React 原生钩子,优化计算结果 ✅ 计算结果优化精准,无性能问题

二、实战核心代码讲解

在展示完整代码之前,我们先深入理解商品列表组件实现的核心逻辑,掌握这些核心代码后,你将能够轻松应对各种商品列表组件相关的开发需求。

1. 基础商品列表

使用 FlatList 实现基础的商品列表渲染。

const BasicProductList = ({ products }) => {
  const renderProduct = ({ item }) => (
    <View style={styles.productCard}>
      <Image source={{ uri: item.image }} style={styles.productImage} />
      <View style={styles.productInfo}>
        <Text style={styles.productName}>{item.name}</Text>
        <Text style={styles.productPrice}>¥{item.price}</Text>
      </View>
    </View>
  );

  return (
    <FlatList
      data={products}
      renderItem={renderProduct}
      keyExtractor={(item) => item.id}
      contentContainerStyle={styles.listContainer}
    />
  );
};

核心要点:

  • 使用 FlatList 实现高性能列表渲染
  • 使用 renderItem 渲染单个商品卡片
  • 使用 keyExtractor 提供唯一键值
  • 鸿蒙端列表渲染流畅,性能优秀

2. 带搜索的商品列表

添加搜索功能,支持关键词过滤商品。

const SearchableProductList = ({ products }) => {
  const [searchText, setSearchText] = useState('');
  const [filteredProducts, setFilteredProducts] = useState(products);

  const handleSearchChange = useCallback((text) => {
    setSearchText(text);
    const filtered = products.filter(product =>
      product.name.toLowerCase().includes(text.toLowerCase())
    );
    setFilteredProducts(filtered);
  }, [products]);

  const renderProduct = ({ item }) => (
    <View style={styles.productCard}>
      <Image source={{ uri: item.image }} style={styles.productImage} />
      <View style={styles.productInfo}>
        <Text style={styles.productName}>{item.name}</Text>
        <Text style={styles.productPrice}>¥{item.price}</Text>
      </View>
    </View>
  );

  return (
    <View style={styles.container}>
      <TextInput
        style={styles.searchInput}
        placeholder="搜索商品"
        value={searchText}
        onChangeText={handleSearchChange}
      />
      <FlatList
        data={filteredProducts}
        renderItem={renderProduct}
        keyExtractor={(item) => item.id}
        contentContainerStyle={styles.listContainer}
      />
    </View>
  );
};

核心要点:

  • 使用 TextInput 实现搜索输入
  • 使用 filter 方法过滤商品数据
  • 使用 useCallback 优化搜索函数
  • 鸿蒙端搜索响应流畅

3. 带分类筛选的商品列表

添加分类筛选功能,支持按类别过滤商品。

const FilterableProductList = ({ products }) => {
  const [selectedCategory, setSelectedCategory] = useState('全部');
  const categories = ['全部', ...new Set(products.map(p => p.category))];

  const filteredProducts = useMemo(() => {
    if (selectedCategory === '全部') {
      return products;
    }
    return products.filter(product => product.category === selectedCategory);
  }, [products, selectedCategory]);

  const renderCategory = (category) => (
    <TouchableOpacity
      key={category}
      style={[
        styles.categoryChip,
        selectedCategory === category && styles.selectedCategoryChip
      ]}
      onPress={() => setSelectedCategory(category)}
    >
      <Text
        style={[
          styles.categoryText,
          selectedCategory === category && styles.selectedCategoryText
        ]}
      >
        {category}
      </Text>
    </TouchableOpacity>
  );

  const renderProduct = ({ item }) => (
    <View style={styles.productCard}>
      <Image source={{ uri: item.image }} style={styles.productImage} />
      <View style={styles.productInfo}>
        <Text style={styles.productName}>{item.name}</Text>
        <Text style={styles.productPrice}>¥{item.price}</Text>
        <Text style={styles.productCategory}>{item.category}</Text>
      </View>
    </View>
  );

  return (
    <View style={styles.container}>
      <View style={styles.categoriesContainer}>
        <FlatList
          horizontal
          data={categories}
          renderItem={({ item }) => renderCategory(item)}
          keyExtractor={(item) => item}
          showsHorizontalScrollIndicator={false}
          contentContainerStyle={styles.categoriesListContent}
        />
      </View>
      <FlatList
        data={filteredProducts}
        renderItem={renderProduct}
        keyExtractor={(item) => item.id}
        contentContainerStyle={styles.listContainer}
      />
    </View>
  );
};

核心要点:

  • 使用 ScrollView 实现横向分类选择
  • 使用 useMemo 优化过滤逻辑
  • 动态渲染分类标签
  • 高亮选中分类
  • 鸿蒙端分类切换流畅

4. 带排序的商品列表

添加排序功能,支持按价格、销量等排序。

const SortableProductList = ({ products }) => {
  const [sortBy, setSortBy] = useState('default');
  const [sortOrder, setSortOrder] = useState('asc');

  const sortedProducts = useMemo(() => {
    const sorted = [...products];
    switch (sortBy) {
      case 'price':
        sorted.sort((a, b) => {
          return sortOrder === 'asc' 
            ? a.price - b.price 
            : b.price - a.price;
        });
        break;
      case 'sales':
        sorted.sort((a, b) => {
          return sortOrder === 'asc' 
            ? a.sales - b.sales 
            : b.sales - a.sales;
        });
        break;
      default:
        break;
    }
    return sorted;
  }, [products, sortBy, sortOrder]);

  const handleSort = useCallback((type) => {
    if (sortBy === type) {
      setSortOrder(sortOrder === 'asc' ? 'desc' : 'asc');
    } else {
      setSortBy(type);
      setSortOrder('asc');
    }
  }, [sortBy, sortOrder]);

  return (
    <View style={styles.container}>
      <View style={styles.sortContainer}>
        <TouchableOpacity
          style={[
            styles.sortButton,
            sortBy === 'price' && styles.activeSortButton
          ]}
          onPress={() => handleSort('price')}
        >
          <Text
            style={[
              styles.sortButtonText,
              sortBy === 'price' && styles.activeSortButtonText
            ]}
          >
            价格 {sortBy === 'price' && (sortOrder === 'asc' ? '↑' : '↓')}
          </Text>
        </TouchableOpacity>
        <TouchableOpacity
          style={[
            styles.sortButton,
            sortBy === 'sales' && styles.activeSortButton
          ]}
          onPress={() => handleSort('sales')}
        >
          <Text
            style={[
              styles.sortButtonText,
              sortBy === 'sales' && styles.activeSortButtonText
            ]}
          >
            销量 {sortBy === 'sales' && (sortOrder === 'asc' ? '↑' : '↓')}
          </Text>
        </TouchableOpacity>
      </View>
      <FlatList
        data={sortedProducts}
        renderItem={renderProduct}
        keyExtractor={(item) => item.id}
        contentContainerStyle={styles.listContainer}
      />
    </View>
  );
};

核心要点:

  • 使用 sort 方法实现排序
  • 支持升序降序切换
  • 动态显示排序状态
  • 鸿蒙端排序性能优秀

5. 带加载更多的商品列表

添加加载更多功能,支持分页加载。

const LoadMoreProductList = ({ products, onLoadMore }) => {
  const [loading, setLoading] = useState(false);
  const [hasMore, setHasMore] = useState(true);
  const [visibleProducts, setVisibleProducts] = useState(products.slice(0, 10));

  const handleLoadMore = useCallback(async () => {
    if (loading || !hasMore) return;

    setLoading(true);
    await onLoadMore();
    setLoading(false);
  }, [loading, hasMore, onLoadMore]);

  const renderFooter = () => {
    if (loading) {
      return (
        <View style={styles.footer}>
          <Text style={styles.footerText}>加载中...</Text>
        </View>
      );
    }
    if (!hasMore) {
      return (
        <View style={styles.footer}>
          <Text style={styles.footerText}>没有更多了</Text>
        </View>
      );
    }
    return null;
  };

  return (
    <FlatList
      data={visibleProducts}
      renderItem={renderProduct}
      keyExtractor={(item) => item.id}
      contentContainerStyle={styles.listContainer}
      onEndReached={handleLoadMore}
      onEndReachedThreshold={0.1}
      ListFooterComponent={renderFooter}
    />
  );
};

核心要点:

  • 使用 onEndReached 检测滚动到底部
  • 使用 ListFooterComponent 显示加载状态
  • 使用 onEndReachedThreshold 控制触发距离
  • 鸿蒙端加载更多流畅

三、实战完整版:企业级通用商品列表组件

import React, { useState, useEffect, useCallback, useMemo, memo } from 'react';
import {
  View,
  Text,
  StyleSheet,
  TouchableOpacity,
  Image,
  FlatList,
  ScrollView,
  TextInput,
  SafeAreaView,
  ActivityIndicator,
} from 'react-native';

// 商品数据类型
interface Product {
  id: string;
  name: string;
  price: number;
  originalPrice: number;
  sales: number;
  image: string;
  category: string;
  rating: number;
  description: string;
}

// 商品列表组件属性类型
interface ProductListProps {
  initialProducts: Product[];
  onLoadMore?: () => Promise<void>;
  onProductPress?: (product: Product) => void;
}

// 商品列表组件
const ProductList = memo(({
  initialProducts,
  onLoadMore,
  onProductPress
}: ProductListProps) => {
  const [products, setProducts] = useState<Product[]>(initialProducts);
  const [searchText, setSearchText] = useState('');
  const [selectedCategory, setSelectedCategory] = useState('全部');
  const [sortBy, setSortBy] = useState('default');
  const [sortOrder, setSortOrder] = useState<'asc' | 'desc'>('asc');
  const [loading, setLoading] = useState(false);
  const [hasMore, setHasMore] = useState(true);

  // 提取分类
  const categories = useMemo(() => {
    const uniqueCategories = new Set(products.map(p => p.category));
    return ['全部', ...Array.from(uniqueCategories)];
  }, [products]);

  // 过滤和排序商品
  const filteredProducts = useMemo(() => {
    let filtered = [...products];

    // 搜索过滤
    if (searchText) {
      filtered = filtered.filter(product =>
        product.name.toLowerCase().includes(searchText.toLowerCase()) ||
        product.description.toLowerCase().includes(searchText.toLowerCase())
      );
    }

    // 分类过滤
    if (selectedCategory !== '全部') {
      filtered = filtered.filter(product => product.category === selectedCategory);
    }

    // 排序
    switch (sortBy) {
      case 'price':
        filtered.sort((a, b) => {
          return sortOrder === 'asc' ? a.price - b.price : b.price - a.price;
        });
        break;
      case 'sales':
        filtered.sort((a, b) => {
          return sortOrder === 'asc' ? a.sales - b.sales : b.sales - a.sales;
        });
        break;
      case 'rating':
        filtered.sort((a, b) => {
          return sortOrder === 'asc' ? a.rating - b.rating : b.rating - a.rating;
        });
        break;
      default:
        break;
    }

    return filtered;
  }, [products, searchText, selectedCategory, sortBy, sortOrder]);

  // 搜索处理
  const handleSearchChange = useCallback((text: string) => {
    setSearchText(text);
  }, []);

  // 分类选择
  const handleCategorySelect = useCallback((category: string) => {
    setSelectedCategory(category);
  }, []);

  // 排序处理
  const handleSort = useCallback((type: string) => {
    if (sortBy === type) {
      setSortOrder(sortOrder === 'asc' ? 'desc' : 'asc');
    } else {
      setSortBy(type);
      setSortOrder('asc');
    }
  }, [sortBy, sortOrder]);

  // 加载更多
  const handleLoadMore = useCallback(async () => {
    if (loading || !hasMore) return;

    setLoading(true);
    await onLoadMore?.();
    setLoading(false);
  }, [loading, hasMore, onLoadMore]);

  // 商品点击
  const handleProductPress = useCallback((product: Product) => {
    onProductPress?.(product);
  }, [onProductPress]);

  // 渲染分类标签
  const renderCategory = useCallback((category: string) => (
    <TouchableOpacity
      key={category}
      style={[
        styles.categoryChip,
        selectedCategory === category && styles.selectedCategoryChip
      ]}
      onPress={() => handleCategorySelect(category)}
    >
      <Text
        style={[
          styles.categoryText,
          selectedCategory === category && styles.selectedCategoryText
        ]}
      >
        {category}
      </Text>
    </TouchableOpacity>
  ), [selectedCategory, handleCategorySelect]);

  // 渲染排序按钮
  const renderSortButton = useCallback((type: string, label: string) => (
    <TouchableOpacity
      key={type}
      style={[
        styles.sortButton,
        sortBy === type && styles.activeSortButton
      ]}
      onPress={() => handleSort(type)}
    >
      <Text
        style={[
          styles.sortButtonText,
          sortBy === type && styles.activeSortButtonText
        ]}
      >
        {label} {sortBy === type && (sortOrder === 'asc' ? '↑' : '↓')}
      </Text>
    </TouchableOpacity>
  ), [sortBy, sortOrder, handleSort]);

  // 渲染商品卡片
  const renderProduct = useCallback(({ item }: { item: Product }) => (
    <TouchableOpacity
      style={styles.productCard}
      onPress={() => handleProductPress(item)}
      activeOpacity={0.8}
    >
      <Image source={{ uri: item.image }} style={styles.productImage} />
      <View style={styles.productInfo}>
        <Text style={styles.productName} numberOfLines={2}>
          {item.name}
        </Text>
        <View style={styles.productMeta}>
          <Text style={styles.productPrice}>¥{item.price}</Text>
          {item.originalPrice > item.price && (
            <Text style={styles.productOriginalPrice}>
              ¥{item.originalPrice}
            </Text>
          )}
        </View>
        <View style={styles.productStats}>
          <Text style={styles.productSales}>已售{item.sales}</Text>
          <Text style={styles.productRating}>{item.rating}</Text>
        </View>
        <Text style={styles.productCategory}>{item.category}</Text>
      </View>
    </TouchableOpacity>
  ), [handleProductPress]);

  // 渲染列表底部
  const renderFooter = useCallback(() => {
    if (loading) {
      return (
        <View style={styles.footer}>
          <ActivityIndicator size="small" color="#409EFF" />
          <Text style={styles.footerText}>加载中...</Text>
        </View>
      );
    }
    if (!hasMore) {
      return (
        <View style={styles.footer}>
          <Text style={styles.footerText}>没有更多了</Text>
        </View>
      );
    }
    return null;
  }, [loading, hasMore]);

  // 渲染空状态
  const renderEmpty = useCallback(() => (
    <View style={styles.emptyContainer}>
      <Text style={styles.emptyText}>暂无商品</Text>
    </View>
  ), []);

  return (
    <SafeAreaView style={styles.container}>
      {/* 标题区域 */}
      <View style={styles.header}>
        <Text style={styles.pageTitle}>React Native for Harmony</Text>
        <Text style={styles.subtitle}>商品列表组件</Text>
      </View>

      {/* 搜索框 */}
      <View style={styles.searchContainer}>
        <TextInput
          style={styles.searchInput}
          placeholder="搜索商品名称或描述"
          value={searchText}
          onChangeText={handleSearchChange}
          placeholderTextColor="#909399"
        />
      </View>

      {/* 分类筛选 */}
      <View style={styles.categoriesContainer}>
        <FlatList
          horizontal
          data={categories}
          renderItem={({ item }) => renderCategory(item)}
          keyExtractor={(item) => item}
          showsHorizontalScrollIndicator={false}
          contentContainerStyle={styles.categoriesListContent}
        />
      </View>

      {/* 排序按钮 */}
      <View style={styles.sortContainer}>
        {renderSortButton('price', '价格')}
        {renderSortButton('sales', '销量')}
        {renderSortButton('rating', '评分')}
      </View>

      {/* 商品列表 */}
      <FlatList
        data={filteredProducts}
        renderItem={renderProduct}
        keyExtractor={(item) => item.id}
        contentContainerStyle={styles.listContainer}
        numColumns={2}
        columnWrapperStyle={styles.row}
        onEndReached={handleLoadMore}
        onEndReachedThreshold={0.1}
        ListFooterComponent={renderFooter}
        ListEmptyComponent={renderEmpty}
        showsVerticalScrollIndicator={false}
      />

      {/* 说明区域 */}
      <View style={styles.infoCard}>
        <Text style={styles.infoTitle}>💡 功能说明</Text>
        <Text style={styles.infoText}>• 高性能列表:使用 FlatList 实现</Text>
        <Text style={styles.infoText}>• 搜索过滤:支持关键词搜索</Text>
        <Text style={styles.infoText}>• 分类筛选:支持按类别过滤</Text>
        <Text style={styles.infoText}>• 多维排序:支持价格、销量、评分排序</Text>
        <Text style={styles.infoText}>• 加载更多:支持分页加载</Text>
        <Text style={styles.infoText}>• 空状态:无数据时显示提示</Text>
        <Text style={styles.infoText}>• 鸿蒙端完美兼容,性能优秀</Text>
      </View>
    </SafeAreaView>
  );
});

ProductList.displayName = 'ProductList';

// 模拟数据
const mockProducts: Product[] = [
  {
    id: '1',
    name: '高端智能手机 256GB',
    price: 3999,
    originalPrice: 4999,
    sales: 1234,
    image: 'https://picsum.photos/200/200?random=1',
    category: '数码',
    rating: 4.8,
    description: '高性能处理器,超长续航'
  },
  {
    id: '2',
    name: '无线蓝牙耳机',
    price: 299,
    originalPrice: 399,
    sales: 5678,
    image: 'https://picsum.photos/200/200?random=2',
    category: '数码',
    rating: 4.6,
    description: '降噪功能,音质出众'
  },
  {
    id: '3',
    name: '时尚运动鞋',
    price: 599,
    originalPrice: 799,
    sales: 890,
    image: 'https://picsum.photos/200/200?random=3',
    category: '服装',
    rating: 4.7,
    description: '舒适透气,时尚百搭'
  },
  {
    id: '4',
    name: '智能手表',
    price: 1299,
    originalPrice: 1599,
    sales: 456,
    image: 'https://picsum.photos/200/200?random=4',
    category: '数码',
    rating: 4.5,
    description: '健康监测,运动追踪'
  },
  {
    id: '5',
    name: '休闲牛仔裤',
    price: 199,
    originalPrice: 299,
    sales: 2345,
    image: 'https://picsum.photos/200/200?random=5',
    category: '服装',
    rating: 4.4,
    description: '经典款式,舒适耐穿'
  },
  {
    id: '6',
    name: '机械键盘',
    price: 499,
    originalPrice: 699,
    sales: 678,
    image: 'https://picsum.photos/200/200?random=6',
    category: '数码',
    rating: 4.9,
    description: '青轴手感,RGB背光'
  },
];

const App = () => {
  const handleLoadMore = async () => {
    // 模拟加载更多
    await new Promise(resolve => setTimeout(resolve, 1000));
  };

  const handleProductPress = (product: Product) => {
    console.log('商品点击:', product.name);
  };

  return (
    <ProductList
      initialProducts={mockProducts}
      onLoadMore={handleLoadMore}
      onProductPress={handleProductPress}
    />
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#F5F7FA',
  },

  // ======== 标题区域 ========
  header: {
    padding: 20,
    backgroundColor: '#FFFFFF',
    borderBottomWidth: 1,
    borderBottomColor: '#EBEEF5',
    zIndex: 10,
  },
  pageTitle: {
    fontSize: 24,
    fontWeight: '700',
    color: '#303133',
    textAlign: 'center',
    marginBottom: 8,
  },
  subtitle: {
    fontSize: 16,
    fontWeight: '500',
    color: '#909399',
    textAlign: 'center',
  },

  // ======== 搜索框 ========
  searchContainer: {
    padding: 16,
    backgroundColor: '#FFFFFF',
    marginBottom: 8,
    zIndex: 9,
  },
  searchInput: {
    height: 40,
    backgroundColor: '#F5F7FA',
    borderRadius: 20,
    paddingHorizontal: 16,
    fontSize: 14,
    color: '#303133',
  },

  // ======== 分类筛选 ========
  categoriesContainer: {
    backgroundColor: '#FFFFFF',
    marginBottom: 8,
    zIndex: 8,
  },
  categoriesListContent: {
    paddingHorizontal: 16,
    paddingVertical: 16,
  },
  categoryChip: {
    paddingHorizontal: 16,
    paddingVertical: 8,
    borderRadius: 16,
    backgroundColor: '#F5F7FA',
    marginRight: 8,
  },
  selectedCategoryChip: {
    backgroundColor: '#409EFF',
  },
  categoryText: {
    fontSize: 14,
    color: '#606266',
    fontWeight: '500',
  },
  selectedCategoryText: {
    color: '#FFFFFF',
  },

  // ======== 排序按钮 ========
  sortContainer: {
    flexDirection: 'row',
    paddingHorizontal: 16,
    paddingVertical: 12,
    backgroundColor: '#FFFFFF',
    gap: 12,
    marginBottom: 8,
    zIndex: 7,
  },
  sortButton: {
    paddingHorizontal: 16,
    paddingVertical: 8,
    borderRadius: 16,
    backgroundColor: '#F5F7FA',
  },
  activeSortButton: {
    backgroundColor: '#409EFF',
  },
  sortButtonText: {
    fontSize: 14,
    color: '#606266',
    fontWeight: '500',
  },
  activeSortButtonText: {
    color: '#FFFFFF',
  },

  // ======== 商品列表 ========
  listContainer: {
    padding: 12,
    marginBottom: 8,
    zIndex: 6,
  },
  row: {
    justifyContent: 'space-between',
  },
  productCard: {
    width: '48%',
    backgroundColor: '#FFFFFF',
    borderRadius: 12,
    marginBottom: 12,
    overflow: 'hidden',
    shadowColor: '#000000',
    shadowOffset: { width: 0, height: 2 },
    shadowOpacity: 0.08,
    shadowRadius: 8,
    elevation: 4,
  },
  productImage: {
    width: '100%',
    height: 150,
    backgroundColor: '#F5F7FA',
  },
  productInfo: {
    padding: 12,
  },
  productName: {
    fontSize: 14,
    fontWeight: '500',
    color: '#303133',
    marginBottom: 8,
    lineHeight: 20,
    height: 40,
  },
  productMeta: {
    flexDirection: 'row',
    alignItems: 'center',
    marginBottom: 6,
  },
  productPrice: {
    fontSize: 16,
    fontWeight: '700',
    color: '#F56C6C',
    marginRight: 8,
  },
  productOriginalPrice: {
    fontSize: 12,
    color: '#909399',
    textDecorationLine: 'line-through',
  },
  productStats: {
    flexDirection: 'row',
    justifyContent: 'space-between',
    marginBottom: 6,
  },
  productSales: {
    fontSize: 12,
    color: '#909399',
  },
  productRating: {
    fontSize: 12,
    color: '#E6A23C',
    fontWeight: '500',
  },
  productCategory: {
    fontSize: 12,
    color: '#909399',
  },

  // ======== 列表底部 ========
  footer: {
    flexDirection: 'row',
    justifyContent: 'center',
    alignItems: 'center',
    padding: 16,
  },
  footerText: {
    fontSize: 14,
    color: '#909399',
    marginLeft: 8,
  },

  // ======== 空状态 ========
  emptyContainer: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    paddingVertical: 40,
  },
  emptyText: {
    fontSize: 16,
    color: '#909399',
  },

  // ======== 信息卡片 ========
  infoCard: {
    backgroundColor: '#FFFFFF',
    borderRadius: 12,
    padding: 16,
    margin: 16,
    marginTop: 16,
    shadowColor: '#000000',
    shadowOffset: { width: 0, height: 2 },
    shadowOpacity: 0.08,
    shadowRadius: 8,
    elevation: 4,
  },
  infoTitle: {
    fontSize: 16,
    fontWeight: '600',
    color: '#303133',
    marginBottom: 12,
  },
  infoText: {
    fontSize: 14,
    color: '#606266',
    lineHeight: 22,
    marginBottom: 6,
  },
});

export default App;

在这里插入图片描述

四、扩展用法:商品列表组件高频进阶优化

基于本次的核心商品列表组件代码,结合RN的内置能力,可轻松实现鸿蒙端开发中所有高频的商品列表进阶需求,全部为纯原生API实现,无需引入任何第三方库,零基础只需在本次代码基础上做简单修改即可实现,实用性拉满,全部真机实测通过,无任何兼容问题,满足企业级高阶需求:

✔️ 扩展1:购物车功能

适配「电商场景」的场景,支持添加到购物车,无需改动核心逻辑,一行代码实现,鸿蒙端完美兼容:

const [cart, setCart] = useState([]);

const handleAddToCart = (product) => {
  setCart([...cart, product]);
};

<TouchableOpacity
  style={styles.addToCartButton}
  onPress={() => handleAddToCart(product)}
>
  <Text style={styles.addToCartButtonText}>加入购物车</Text>
</TouchableOpacity>

✔️ 扩展2:收藏功能

适配「用户场景」的场景,支持收藏商品,无需改动核心逻辑,一行代码实现,鸿蒙端完美兼容:

const [favorites, setFavorites] = useState([]);

const handleToggleFavorite = (product) => {
  if (favorites.includes(product.id)) {
    setFavorites(favorites.filter(id => id !== product.id));
  } else {
    setFavorites([...favorites, product.id]);
  }
};

<TouchableOpacity
  onPress={() => handleToggleFavorite(product)}
>
  <Text style={favorites.includes(product.id) ? styles.favorited : styles.unfavorited}>
    {favorites.includes(product.id) ? '❤' : '♡'}
  </Text>
</TouchableOpacity>

✔️ 扩展3:价格区间筛选

适配「筛选场景」的场景,支持价格范围过滤,无需改动核心逻辑,一行代码实现,鸿蒙端完美兼容:

const [priceRange, setPriceRange] = useState([0, 10000]);

const filteredProducts = useMemo(() => {
  return products.filter(product =>
    product.price >= priceRange[0] && product.price <= priceRange[1]
  );
}, [products, priceRange]);

✔️ 扩展4:多选功能

适配「批量操作」的场景,支持批量选择商品,无需改动核心逻辑,一行代码实现,鸿蒙端完美兼容:

const [selectedProducts, setSelectedProducts] = useState([]);

const handleToggleSelect = (product) => {
  if (selectedProducts.includes(product.id)) {
    setSelectedProducts(selectedProducts.filter(id => id !== product.id));
  } else {
    setSelectedProducts([...selectedProducts, product.id]);
  }
};

<TouchableOpacity
  style={[
    styles.selectButton,
    selectedProducts.includes(product.id) && styles.selectedButton
  ]}
  onPress={() => handleToggleSelect(product)}
>
  <Text style={styles.selectButtonText}>
    {selectedProducts.includes(product.id) ? '✓' : ''}
  </Text>
</TouchableOpacity>

✔️ 扩展5:下拉刷新

适配「数据更新」的场景,支持下拉刷新数据,无需改动核心逻辑,一行代码实现,鸿蒙端完美兼容:

const [refreshing, setRefreshing] = useState(false);

const handleRefresh = async () => {
  setRefreshing(true);
  await loadProducts();
  setRefreshing(false);
};

<FlatList
  refreshing={refreshing}
  onRefresh={handleRefresh}
  // ...其他props
/>

欢迎加入开源鸿蒙跨平台社区:https://openharmonycrossplatform.csdn.net

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