javascript 谷歌地图 API - 以客户当前位置为中心的地图
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/17382128/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Google maps API - Center map on client's current location
提问by James
I've looked at the various other times this question has been asked but I can't quite put a finger on where I'm going wrong, here's my code:
我已经看过这个问题的其他各种时间，但我不能完全指出我哪里出错了，这是我的代码：
<html>
<head>
<title> Map </title>
<style>
html, body, #map-canvas {
margin: 0;
padding: 0;
height: 500px;
width: 800px;}
</style>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
<script>
var map;
function initialize()
{
var myLatlng1 = new google.maps.LatLng(53.65914, 0.072050);
var mapOptions =
{
zoom: 10,
center: myLatlng1,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById('map-canvas'),
mapOptions);
<?php
$sql = mysql_query("SELECT * FROM data ORDER BY ID DESC");
while($row =mysql_fetch_array($sql))
{
$desc = $row['DESCRIPTION'];
$location = $row['LOCATION'];
$counter += 1;
?>
var marker = new google.maps.Marker({
position: new google.maps.LatLng(<?php echo $location; ?>),
map: map,
title: '<?php echo $desc; ?>',
icon: '/image/cam.png'
});
navigator.geolocation.getCurrentPosition(showPosition);
}
var showPosition = function (position)
{
map.setCenter(new google.maps.LatLng(position.coords.latitude, position.coords.longitude), 16);
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
It originally sets the center to myLatlng1, and the code at the bottom to set it to the user's current location doesn't do anything, any ideas?
它最初将中心设置为myLatlng1，而底部将其设置为用户当前位置的代码没有做任何事情，有什么想法吗？
Thanks in advance.
提前致谢。
回答by Praveen
Try using the below code to get the user's current location (GEOLOCATION):
尝试使用以下代码获取用户的当前位置（GEOLOCATION）：
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function (position) {
initialLocation = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
map.setCenter(initialLocation);
});
}
For showing an example, I've removed your php code. Check this JSFiddle
为了展示一个例子，我删除了你的 php 代码。检查这个JSFiddle
Hope you understand.
希望你能理解。
回答by shacker
To provide a useful map whether user allowed or denied the browser's "Allow location detection?" prompt (modify the default location to suit):
提供有用的地图，无论用户是允许还是拒绝浏览器的“允许位置检测？” 提示（修改默认位置以适应）：
<script>
function initMap() {
gMap = new google.maps.Map(document.getElementById('map'));
navigator.geolocation.getCurrentPosition(function(position) {
// Center on user's current location if geolocation prompt allowed
var initialLocation = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
gMap.setCenter(initialLocation);
gMap.setZoom(13);
}, function(positionError) {
// User denied geolocation prompt - default to Chicago
gMap.setCenter(new google.maps.LatLng(39.8097343, -98.5556199));
gMap.setZoom(5);
});
}
</script>
