react-native init安装指定版本的react-native

C:UsersHONGZHENHUAimooc_gpindex.js

index.js

/** @format */
import React,{ Component } from 'react';
import {AppRegistry,StyleSheet,Image,Text,View} from 'react-native';
import App from './App';
import {name as appName} from './app.json';
import TabNavigator from 'react-native-tab-navigator';
export default class imooc_gp extends Component {
    constructor(props){
        super(props);
        this.state={
            selectedTab:'home',
        }
    }
    render(){

        return (
            <View style={styles.container}>
                <TabNavigator>
                    <TabNavigator.Item
                        selected={this.state.selectedTab === 'home'}
                        title="Home"
                        renderIcon={() => <Image source={require('./res/images/ic_polular.png')} />}
                        renderSelecte
                        dIcon={() => <Image source={require('./res/images/ic_polular.png')} />}
                        badgeText="1"
                        onPress={() => this.setState({ selectedTab: 'home' })}>
                        {homeView}
                        <View style={styles.page1}></View>
                    </TabNavigator.Item>
                    <TabNavigator.Item
                        selected={this.state.selectedTab === 'profile'}rea
                        title="Profile"
                        renderIcon= {() => <Image source = {require('./res/images/ic_trending.png')}/>}
                        renderSelectedIcon = {() => <Image source = {require('./res/images/ic_trending.png')} />}
                        renderBadge = {() => <CustomBadgeView/> }
                        onPress = {() => this.setState({selectedTab: 'profile'})}>
                        {
                            profileView
                        }
                        <View style={styles.page2}></View>
                    </TabNavigator.Item>
                </TabNavigator>
            </View>
        );
    }
}
const styles = StyleSheet.create({
    container: {
        flex: 1,
        justifyContent: 'center',
        alignItems: 'center',
        backgroundColor: '#F5FCFF',
    },
    page1:{
        flex:1,
        backgroundColor: 'red',

    },
    page2:{
        flex:1,
        backgroundColor:'yellow',
    }
});


AppRegistry.registerComponent('imooc_gp', () => imooc_gp);

C:UsersHONGZHENHUAimooc_gppackage.json

package.json

{
  "name": "imooc_gp",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "test": "jest"
  },
  "dependencies": {
    "babel-core": "^6.26.3",
    "babel-loader": "^8.0.4",
    "react": "16.3.1",
    "react-native": "0.55.4",
    "react-native-tab-navigator": "^0.3.4"
  },
  "devDependencies": {
    "babel-jest": "23.6.0",
    "babel-preset-react-native": "4.0.1",
    "jest": "23.6.0",
    "react-test-renderer": "16.3.1"
  },
  "jest": {
    "preset": "react-native"
  }
}