React Native底部tab栏的使用

安装依赖：

yarn add @react-navigation/bottom-tabs react-native-safe-area-context createBottomTabNavigator

最简洁的tabbar示例，App.tsx里放置代码：

import * as React from 'react';
import { Text, View } from 'react-native';
import { NavigationContainer } from '@react-navigation/native';
import { createBottomTabNavigator } from '@react-navigation/bottom-tabs';

function HomeScreen() {
  return (
 <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
   <Text>Home!</Text>
 </View>
  );
}

function SettingsScreen() {
  return (
 <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
   <Text>Settings!</Text>
 </View>
  );
}

const Tab = createBottomTabNavigator();

export default function App() {
  return (
 <NavigationContainer>
   <Tab.Navigator>
     <Tab.Screen name="Home" component={HomeScreen} />
     <Tab.Screen name="Settings" component={SettingsScreen} />
   </Tab.Navigator>
 </NavigationContainer>
  );
}

官方文档：https://reactnavigation.org/docs/tab-based-navigation#minimal-example-of-tab-based-navigation