学一个变成语言，一般我们都先完成一个hellowrold。这就不写了，然后根据Rn官网的顺序 我们需要了解 Props(属性)和State(状态)
Props 属性用于定制一些必要的参数
State 可以动态的改变一些状态 一般在构造方法中初始化 constructor中。
小例子：
[html] view plain copy print ? /** * Sample React Native App * https://github.com/facebook/react-native * @flow */ import React, { Component } from ‘react’; import { AppRegistry, StyleSheet, Text, View, Image } from ‘react-native’; class HaiSheng extends Component { render() { let pic = { uri : ‘https://upload.wikimedia.org/wikipedia/commons/d/de/Bananavarieties.jpg’ }; return ( <View style={styles.container}> <Text style={styles.welcome}> Welcome to React Native! </Text> <Text style={styles.namec}> 欢迎大海！我是大海 你们好哇！</Text> <Image source={pic} style={{width: 200, height: 200}} /> <Greeting name=“Rxjava”/> <Greeting name=“RxAndroid”/> <Greeting name=“Rxxdux”/> <Blink text=‘I love to blink’ /> <Blink text=‘Yes blinking is so great’ /> <Blink text=‘Why did they ever take this out of HTML’ /> <Blink text=‘Look at me look at me look at me’ /> <View style={{width: 50,height: 50,backgroundColor:”green”}}/> </View> ); } } class Greeting extends Component{ render(){ return( <View style={{alignItems:”center”}}> <Text> Hello {this.props.name} </Text> </View> ); } } class Blink extends Component{ constructor(props){ super(props); this.state = {showText: true}; // 每1000毫秒对showText状态做一次取反操作 setInterval(() => { this.setState({ showText: !this.state.showText }); }, 1000); } render(){ // 根据当前showText的值决定是否显示text内容 let display = this.state.showText ? this.props.text : ’ ’; return ( <Text>{display}</Text> ); } } const styles = StyleSheet.create({ container: { flex: 1, justifyContent: ‘center’, alignItems: ‘center’, backgroundColor: ’#F5FCFF’, }, welcome: { fontSize: 20, textAlign: ‘center’, margin: 10, }, namec:{ fontSize:26, textAlign:”center”, margin:10, } }); AppRegistry.registerComponent(‘HaiSheng’, () => HaiSheng); /** * Sample React Native App * https://github.com/facebook/react-native * @flow */ import React, { Component } from 'react'; import { AppRegistry, StyleSheet, Text, View, Image } from 'react-native'; class HaiSheng extends Component { render() { let pic = { uri : 'https://upload.wikimedia.org/wikipedia/commons/d/de/Bananavarieties.jpg' }; return ( <View style={styles.container}> <Text style={styles.welcome}> Welcome to React Native! </Text> <Text style={styles.namec}> 欢迎大海！我是大海 你们好哇！</Text> <Image source={pic} style={{width: 200, height: 200}} /> <Greeting name="Rxjava"/> <Greeting name="RxAndroid"/> <Greeting name="Rxxdux"/> <Blink text='I love to blink' /> <Blink text='Yes blinking is so great' /> <Blink text='Why did they ever take this out of HTML' /> <Blink text='Look at me look at me look at me' /> <View style={{width: 50,height: 50,backgroundColor:"green"}}/> </View> ); } } class Greeting extends Component{ render(){ return( <View style={{alignItems:"center"}}> <Text> Hello {this.props.name} </Text> </View> ); } } class Blink extends Component{ constructor(props){ super(props); this.state = {showText: true}; // 每1000毫秒对showText状态做一次取反操作 setInterval(() => { this.setState({ showText: !this.state.showText }); }, 1000); } render(){ // 根据当前showText的值决定是否显示text内容 let display = this.state.showText ? this.props.text : ' '; return ( <Text>{display}</Text> ); } } const styles = StyleSheet.create({ container: { flex: 1, justifyContent: 'center', alignItems: 'center', backgroundColor: '#F5FCFF', }, welcome: { fontSize: 20, textAlign: 'center', margin: 10, }, namec:{ fontSize:26, textAlign:"center", margin:10, } }); AppRegistry.registerComponent('HaiSheng', () => HaiSheng); 显示效果：
