React Native中的身份验证流

import React, { useState } from 'react';
import { View, TextInput, Button, Alert } from 'react-native';
import AsyncStorage from '@react-native-async-storage/async-storage';

const LoginScreen = ({ navigation }) => {
  const [username, setUsername] = useState('');
  const [password, setPassword] = useState('');

  const handleLogin = async () => {
    try {
      // 模拟登录请求
      const response = await fetch('https://your-api-endpoint.com/login', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({ username, password }),
      });

      const data = await response.json();

      if (data.token) {
        await AsyncStorage.setItem('userToken', data.token);
        navigation.navigate('Home');
      } else {
        Alert.alert('Login Failed', 'Invalid credentials');
      }
    } catch (error) {
      console.error(error);
      Alert.alert('Error', 'Failed to login');
    }
  };

  return (
    <View>
      <TextInput
        placeholder="Username"
        value={username}
        onChangeText={setUsername}
      />
      <TextInput
        placeholder="Password"
        secureTextEntry
        value={password}
        onChangeText={setPassword}
      />
      <Button title="Login" onPress={handleLogin} />
    </View>
  );
};

export default LoginScreen;

await AsyncStorage.setItem('userToken', data.token);

import React, { useEffect } from 'react';
import { NavigationContainer } from '@react-navigation/native';
import { createStackNavigator } from '@react-navigation/stack';
import AsyncStorage from '@react-native-async-storage/async-storage';

import LoginScreen from './LoginScreen';
import HomeScreen from './HomeScreen';

const Stack = createStackNavigator();

const App = () => {
  const [isAuthenticated, setIsAuthenticated] = useState(false);

  useEffect(() => {
    const checkAuth = async () => {
      const token = await AsyncStorage.getItem('userToken');
      if (token) {
        setIsAuthenticated(true);
      }
    };

    checkAuth();
  }, []);

  return (
    <NavigationContainer>
      <Stack.Navigator initialRouteName={isAuthenticated ? 'Home' : 'Login'}>
        <Stack.Screen name="Login" component={LoginScreen} />
        <Stack.Screen name="Home" component={HomeScreen} options={{ headerShown: false }} />
      </Stack.Navigator>
    </NavigationContainer>
  );
};

export default App;

import React, { useEffect } from 'react';
import { View, Button } from 'react-native';
import AsyncStorage from '@react-native-async-storage/async-storage';

const HomeScreen = ({ navigation }) => {
  const refreshTokens = async () => {
    try {
      // 模拟刷新令牌请求
      const response = await fetch('https://your-api-endpoint.com/refresh-token', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
      });

      const data = await response.json();

      if (data.token) {
        await AsyncStorage.setItem('userToken', data.token);
      } else {
        Alert.alert('Token Refresh Failed', 'Failed to refresh token');
      }
    } catch (error) {
      console.error(error);
      Alert.alert('Error', 'Failed to refresh token');
    }
  };

  useEffect(() => {
    const interval = setInterval(refreshTokens, 60000); // 每分钟刷新一次
    return () => clearInterval(interval);
  }, []);

  return (
    <View>
      <Button title="Logout" onPress={() => navigation.navigate('Login')} />
    </View>
  );
};

export default HomeScreen;

const handleLogout = async () => {
  await AsyncStorage.removeItem('userToken');
  navigation.navigate('Login');
};

return (
  <View>
    <Button title="Logout" onPress={handleLogout} />
  </View>
);