mobile

移动开发

构建跨平台移动应用。

适用场景

• React Native 开发
• Flutter 开发
• 移动性能问题
• 原生模块集成
• 应用商店发布

React Native

组件结构

import React, { useState, useCallback } from "react";
import { View, Text, TouchableOpacity, StyleSheet } from "react-native";

interface Props {
  title: string;
  onPress: () => void;
}

export function Button({ title, onPress }: Props) {
  const [pressed, setPressed] = useState(false);

  const handlePress = useCallback(() => {
    setPressed(true);
    onPress();
  }, [onPress]);

  return (
    <TouchableOpacity
      style={[styles.button, pressed && styles.pressed]}
      onPress={handlePress}
      activeOpacity={0.7}
    >
      <Text style={styles.text}>{title}</Text>
    </TouchableOpacity>
  );
}

const styles = StyleSheet.create({
  button: {
    backgroundColor: "#007AFF",
    padding: 16,
    borderRadius: 8,
  },
  pressed: {
    opacity: 0.8,
  },
  text: {
    color: "white",
    fontWeight: "600",
    textAlign: "center",
  },
});

导航

import { NavigationContainer } from "@react-navigation/native";
import { createNativeStackNavigator } from "@react-navigation/native-stack";

type RootStackParamList = {
  Home: undefined;
  Details: { id: string };
};

const Stack = createNativeStackNavigator<RootStackParamList>();

function App() {
  return (
    <NavigationContainer>
      <Stack.Navigator>
        <Stack.Screen name="Home" component={HomeScreen} />
        <Stack.Screen name="Details" component={DetailsScreen} />
      </Stack.Navigator>
    </NavigationContainer>
  );
}

Flutter

Widget 结构

class MyButton extends StatelessWidget {
  final String title;
  final VoidCallback onPressed;

  const MyButton({
    Key? key,
    required this.title,
    required this.onPressed,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return ElevatedButton(
      onPressed: onPressed,
      style: ElevatedButton.styleFrom(
        padding: const EdgeInsets.all(16),
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(8),
        ),
      ),
      child: Text(title),
    );
  }
}

性能提示

• 使用 FlatList/ListView 处理长列表
• 使用 useCallback 缓存回调
• 避免内联样式（使用 StyleSheet）
• 延迟加载屏幕和图片
• 使用 Flipper/DevTools 进行性能分析

常见模式

模式	React Native	Flutter
状态	useState/Redux	setState/Riverpod
导航	React Navigation	Navigator 2.0
HTTP	fetch/axios	http/dio
存储	AsyncStorage	shared_preferences
动画	Animated/Reanimated	AnimationController

示例

输入：“构建列表屏幕” **操作：**创建启用虚拟化、支持下拉刷新和分页的 FlatList

输入：“添加离线支持” **操作：**实现 AsyncStorage 缓存、同步队列和网络检测