没图你说个xx
NetInfo简介
NetInfo 用来获取网络状态。
提供的属性方法如下:
- isConnected : 表示网络是否连接
- fetch(): 获取网络状态
- addEvent Li 沙特呢人(eventName,handler):添加事件监听。
- removeEventListener:(eventName,handler):删除事件监听。
其中,网络状态主要有以下几种类型。
- none:离线状态。
- wifi:在线状态。并且通过WiFi或者是iOS 模拟器连接。
- cell: 网络连接。通过3g,WiMax或者LTE进行连接。蜂窝网络。
- unknown:错误情况。网络状态未知。
直接上代码:
老样子,我们封装一个组件:
netinfo.js
var React = require('react-native')
var {
AppRegistry,StyleSheet,View,Text,NetInfo,TouchableOpacity,PixelRatio,} = React;
var Netinfo = React.createClass({
getInitialState: function(){
return{
netstate:null
}
},componentDidMount: function(){
// NetInfo.addEventListener('change',function(reachability){
// alert(reachability)
// });
},render:function(){
return(
<View style= {styles.flex}>
<TouchableOpacity
style = {styles.borderStyle}
onPress = {this.getCurrentNetInfo}>
<Text style = {styles.font}>
获取当前网络状态
</Text>
</TouchableOpacity>
<TouchableOpacity
style = {styles.borderStyle}
onPress = {this.getCurrentNetState}>
<Text style = {styles.font}>
获取当前网络是否连接
</Text>
</TouchableOpacity>
<TouchableOpacity
style = {styles.borderStyle}
onPress = {this.reachabilityNetState}>
<Text style = {styles.font}>
监听网络是否链接
</Text>
</TouchableOpacity>
</View>
);
},getCurrentNetInfo: function(){
NetInfo.fetch().done(function(reachability){
alert(reachability);
});
},getCurrentNetState: function(){
NetInfo.isConnected.fetch().done(function(isConnected){
alert(isConnected);
});
},reachabilityNetState: function(){
NetInfo.isConnected.addEventListener('change',function(isConnected){
alert(isConnected);
});
},});
var styles = StyleSheet.create({
flex: {
flex: 1,},borderStyle: {
marginRight: 10,marginLeft:10,marginTop:74,alignSelf:'center',borderWidth: 1/PixelRatio.get(),borderRadius: 5,borderColor: '#aaa',font: {
fontSize:15,color: '#222',}
})
module.exports = Netinfo;
在os.index.js中我们这样做:
'use strict';
var React = require('react-native');var Netinfo = require('./iOSFile/netinfo.js');
var {
AppRegistry,Image,ScrollView,WebView,NavigatorIOS,AsyncStorage,} = React;
var styles = StyleSheet.create({
container : {
flex: 1
},row : {
flexDirection: 'row',marginBottom: 10,item : {
flex: 1,marginLeft:5,borderWidth: 1,borderColor: '#ddd',marginRight: 5,height: 100,img: {
flex: 1,backgroundColor: 'transparent',item_text: {
backgroundColor: '#000',opacity:0.7,color:'#fff',height:25,lineHeight:18,textAlign:'center',marginTop:74
},btn: {
backgroundColor: '#ff7200',height: 33,textAlign : 'center',color: '#fff',marginRight: 10,lineHeight: 24,marginTop: 40,fontSize: 18,list_item : {
marginLeft: 5,padding:5,height: 30,borderRadius: 3,list_item_desc : {
flex: 2,fontSize: 15,list_item_price: {
flex: 1,textAlign: 'right',clear: {
marginTop : 10,backgroundColor: '#fff',color: '#000',borderWidth:1,marginLeft: 10,marginRight:10,height:33,textAlign: 'center',}
});
var wxsPrj = React.createClass({
render: function() {
return (
<NavigatorIOS style = {styles.container} initialRoute = { { component:Netinfo,title:'样式列表',barTintColor: '#ddd' } }/> ); } }); AppRegistry.registerComponent('wxsPrj',() => wxsPrj);