React Native - 使用Geolocation进行定位

2017-09-30  本文已影响0人  大蝦

简书对代码展示不太友好,我在CSDN也发布了,

地址是:https://code.csdn.net/snippets/2586710

import React,{Component} from 'react';

import {StyleSheet,View,Text,Button} from 'react-native';

//要引用定位连接,否则会提示找不到对象,很多资料都没说到这一点。

varGeolocation =require('Geolocation');

export class ViewGeolocation  extends  Component{

constructor(props){

super(props);

this.state={

LocalPosition:'',

}

};

GetGeolocation(){

/*

说明:getCurrentPosition(fun_success,fun_error,geo_options)

成功回调函数与失败回调函数的写法, 应该使用箭头函数方式,因为回调结果可以供当前页面的this所调用,否则当前页面使用不了。

例:getCurrentPosition(function(val){ this.setState....  },function(val){ this.setState....})

会提示未定义函数或找不到对像,错误位置为this.setState

*/

Geolocation.getCurrentPosition(val => {

let  ValInfo ="速度:"+ val.coords.speed+

"\n经度:"+ val.coords.longitude+

"\n纬度:"+ val.coords.latitude+

"\n准确度:"+ val.coords.accuracy+

"\n行进方向:"+ val.coords.heading+

"\n海拔:"+ val.coords.altitude+

"\n海拔准确度:"+ val.coords.altitudeAccuracy+

"\n时间戳:"+ val.timestamp;

this.setState({LocalPosition: ValInfo});

},val => {

letValInfo ='获取坐标失败:'+ val;

this.setState({LocalPosition: ValInfo});

});

}

render(){

return(

{this.state.LocalPosition}

);

}

}

constStyle=StyleSheet.create({

container:{flexDirection:'column',justifyContent:'center',margin:5,marginTop:20},

text:{backgroundColor:'lightgray',justifyContent:'center'},

});

上一篇下一篇

猜你喜欢

热点阅读