详解React Native顶|底部导航使用小技巧

import React, { Component } from 'react';
import {
  AppRegistry,
  StyleSheet,
  Button,
  Text,
  View,
  Image,
  StatusBar
} from 'react-native';
import { StackNavigator, TabBarBottom, TabNavigator } from "react-navigation";


class Home extends React.Component {
  static navigationOptions = {
    tabBarLabel: '热点',
    tabBarIcon: ({ focused, tintColor }) => (
      <Image
        source={focused ? require('../res/images/hot_hover.png') : require('../res/images/hot.png')}
        style={{ width: 26, height: 26, tintColor: tintColor }}
      />
    )
  };
  render() {
    return (
      <View style={styles.container}>
        <Text>！这是热点</Text>
      </View>
    );
  }
}

class Circle extends React.Component {
  static navigationOptions = {
    tabBarLabel: '圈子',
    tabBarIcon: ({ focused, tintColor }) => (
      <Image
        source={focused ? require('../res/images/coterie.png') : require('../res/images/coterie.png')}
        style={{ width: 26, height: 26, tintColor: tintColor }}
      />
    )
  };
  render() {
    return (
      <View style={styles.container}>
        <Text>！这是圈子</Text>
      </View>
    );
  }
}

class Tools extends React.Component {
  static navigationOptions = {
    tabBarLabel: '工具',
    tabBarIcon: ({ focused, tintColor }) => (
      <Image
        source={focused ? require('../res/images/tool.png') : require('../res/images/tool.png')}
        style={{ width: 26, height: 26, tintColor: tintColor }}
      />
    )
  };
  render() {
    return (
      <View style={styles.container}>
        <Text>！这是工具</Text>
      </View>
    );
  }
}

class Mypage extends React.Component {
  static navigationOptions = {
    tabBarLabel: '我的',
    tabBarIcon: ({ focused, tintColor }) => (
      <Image
        source={focused ? require('../res/images/my_hover.png') : require('../res/images/my.png')}
        style={{ width: 26, height: 26, tintColor: tintColor }}
      />
    )
  };
  render() {
    return (
      <View style={styles.container}>
        <Text>！这是我的</Text>
      </View>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#fff',
  }
});


const MyApp = TabNavigator(
  {
    Home: {
      screen: Home,
    },
    Circle: {
      screen: Circle,
    },
    Tools: {
      screen: Tools,
    },
    Mypage: {
      screen: Mypage,
    },
  },
  {
    tabBarOptions: {
      activeTintColor: '#4BC1D2',
      inactiveTintColor: '#000',
      showIcon: true,
      showLabel: true,
      upperCaseLabel: false,
      pressColor: '#823453',
      pressOpacity: 0.8,
      style: {
        backgroundColor: '#fff',
        paddingBottom: 0,
        borderTopWidth: 0.5,
        borderTopColor: '#ccc',
      },
      labelStyle: {
        fontSize: 12,
        margin: 1
      },
      indicatorStyle: { height: 0 }, //android 中TabBar下面会显示一条线，高度设为 0 后就不显示线了
    },
    tabBarPosition: 'bottom',
    swipeEnabled: false,
    animationEnabled: false,
    lazy: true,
    backBehavior: 'none',
  });

module.exports = MyApp;