利用HTML5定位功能实现在百度地图上定位

利用HTML5定位功能,实现在百度地图上定位

代码如下:

<!DOCTYPE html>

<html lang="en">

<head>

<meta charset="UTF-8">

<title>HTML5定位</title>

<script type="text/Javascript" src="https://lib.sinaapp.com/js/jquery/1.7.2/jquery.min.js"></script>

<script type="text/javascript" src="https://api.map.baidu.com/api?v=2.0&ak=wqBXfIN3HkpM1AHKWujjCdsi"></script>

<script type="text/javascript" src="https://developer.baidu.com/map/jsdemo/demo/convertor.js"></script>

<style type="text/css">

*{ margin: 0px; padding: 0px;}

body{text-align: center;  height: 100%;overflow:hidden;}

#allmap{ width: 100%;height: 100%; position: absolute;}

</style>

</head>

<body>

<div></div>

<script type="text/javascript">

$(function(){

if(supportsGeoLocation()){

alert("你的浏览器支持 GeoLocation.");

}else{

alert("不支持 GeoLocation.")

}

// 检测浏览器是否支持HTML5

function supportsGeoLocation(){

return !!navigator.geolocation;

// 单次位置请求执行的函数           

function getLocation(){

navigator.geolocation.getCurrentPosition(mapIt,locationError);

}

//定位成功时,执行的函数

function mapIt(position){

var lon = position.coords.longitude;

var lat = position.coords.latitude;

// alert("您位置的经度是:"+lon+" 纬度是:"+lat);

var map = new BMap.Map("allmap");

var point = new BMap.Point(""+lon+"",""+lat+"");

map.centerAndZoom(point,19);

var gc = new BMap.Geocoder();

translateCallback = function (point){

var marker = new BMap.Marker(point);

map.addOverlay(marker);

map.setCenter(point);

gc.getLocation(point, function(rs){

var addComp = rs.addressComponents;

if(addComp.province!==addComp.city){

var sContent =

"<div><h4>你当前的位置是:</h4>" +

"<p>"+addComp.province + ", " + addComp.city + ", " + addComp.district + ", " + addComp.street + ", " + addComp.streetNumber+"</p>" +

"</div>";}

else{

var sContent =

"<div><h4>你当前的位置是:</h4>" +

"<p>"+ addComp.city + ", " + addComp.district + ", " + addComp.street + ", " + addComp.streetNumber+"</p>" +

"</div>";

}

var infoWindow = new BMap.InfoWindow(sContent);

map.openInfoWindow(infoWindow,point);

});

}                   

BMap.Convertor.translate(point,0,translateCallback);

}

// 定位失败时,执行的函数

function locationError(error)

{

switch(error.code)

{

case error.PERMISSION_DENIED:

alert("User denied the request for Geolocation.");

break;

case error.POSITION_UNAVAILABLE:

alert("Location information is unavailable.");

break;

case error.TIMEOUT:

alert("The request to get user location timed out.");

break;

case error.UNKNOWN_ERROR:

alert("An unknown error occurred.");

break;

}

}

// 页面加载时执行getLocation函数

window.onload = getLocation; 

})

</script>

</body>

</html>

测试浏览器:ie11定位成功率100%,Safari定位成功率97%。其它浏览器暂时不行,HTML5获取不了地理位置信息。

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