React-Native需要css和布局-20160902

import React, { Component } from 'react';
import {
  AppRegistry,
  StyleSheet,
  Text,
  View,
} from 'react-native';

class helloworld extends Component {
  render() {
    return (
        <View style={styles.style_0}>
            <View style = {styles.styleView}>
                <Text style={styles.style_text}>*摆放</Text>
            </View>

            <View style={[styles.styleView ,styles.centerView]}>
                    <Text style={styles.style_text}>居中显示</Text>
            </View>

            <View style={[styles.styleView,styles.rightView]}>
                    <Text style={styles.style_text}>居右显示</Text>
            </View>

            <View style={[styles.styleView,styles.leftView]}>
                <Text style={styles.style_text}>居左显示</Text>
            </View>

           <View style={[styles.styleView,styles.autoView,{marginTop:20}]}>
                 <Text style={styles.style_text}>自动显示</Text>
           </View>

           <View style={[styles.styleView,styles.stretchView,{marginTop:20}]}>
                 <Text style={styles.style_text}>伸展显示</Text>
             </View>
          <View style={styles.vertical_centerView}>
                 <Text style={styles.style_text}>垂直居中显示显示</Text>
          </View>
        </View>
    );
  }
}

        const styles = StyleSheet.create({
            style_0:{
                flex:1,
                borderColor:'red',
                borderWidth:2,
            },
            styleView:{
                width:100,
                height:50,
                backgroundColor:'blue'
            },
            style_text:{
                color:'white',
                marginTop:18,
                textAlign:'center',
            },
            centerView:{
              alignSelf:'center',
            },
            rightView:{
                alignSelf:'flex-end',
            },
            leftView:{
                alignSelf:'flex-start'
            },
            autoView:{
                alignSelf:'auto'
            },
            stretchView:{
                alignSelf:'stretch'
            },
            vertical_centerView:{
                flex:1,
                borderColor:'red',
                borderWidth:2,
                justifyContent:'center',
                alignItems:'center',
            },

        });

AppRegistry.registerComponent('小棚', () => helloworld);

　　运行结果