Javascript 如何使用 Google Maps API v3 获取客户端位置？
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How to get Client location using Google Maps API v3?
提问by manraj82
How do you get Client location using Google Maps API v3? I tried the following code but kept getting the "google.loader.ClientLocation is null or not an object" error. Any ideas why ??
您如何使用 Google Maps API v3 获取客户端位置？我尝试了以下代码，但一直收到“google.loader.ClientLocation 为空或不是对象”错误。任何想法为什么？
if (google.loader.ClientLocation) {
alert(google.loader.ClientLocation.latitude+" "+google.loader.ClientLocation.longitude);
}
Thank You
谢谢你
回答by tomodian
Try this :)
尝试这个 ：）
<script type="text/javascript" src="http://www.google.com/jsapi"></script>
<script type="text/javascript">
function initialize() {
var loc = {};
var geocoder = new google.maps.Geocoder();
if(google.loader.ClientLocation) {
loc.lat = google.loader.ClientLocation.latitude;
loc.lng = google.loader.ClientLocation.longitude;
var latlng = new google.maps.LatLng(loc.lat, loc.lng);
geocoder.geocode({'latLng': latlng}, function(results, status) {
if(status == google.maps.GeocoderStatus.OK) {
alert(results[0]['formatted_address']);
};
});
}
}
google.load("maps", "3.x", {other_params: "sensor=false", callback:initialize});
</script>
回答by TrojanMorse
A bit late but I got something similar that I'm busy building and here is the code to get current location - be sure to use local server to test.
有点晚了，但我得到了一些类似的东西，我正在忙着构建，这里是获取当前位置的代码 - 请务必使用本地服务器进行测试。
Include relevant scripts from CDN:
包括来自 CDN 的相关脚本：
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&signed_in=true&callback=initMap">
HTML
HTML
<div id="map"></div>
CSS
CSS
html, body {
height: 100%;
margin: 0;
padding: 0;
}
#map {
height: 100%;
}
JS
JS
var map = new google.maps.Map(document.getElementById('map'), {
center: {lat: -34.397, lng: 150.644},
zoom: 6
});
var infoWindow = new google.maps.InfoWindow({map: map});
// Try HTML5 geolocation.
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var pos = {
lat: position.coords.latitude,
lng: position.coords.longitude
};
infoWindow.setPosition(pos);
infoWindow.setContent('Location found.');
map.setCenter(pos);
}, function() {
handleLocationError(true, infoWindow, map.getCenter());
});
} else {
// Browser doesn't support Geolocation
handleLocationError(false, infoWindow, map.getCenter());
}
function handleLocationError(browserHasGeolocation, infoWindow, pos) {
infoWindow.setPosition(pos);
infoWindow.setContent(browserHasGeolocation ?
'Error: The Geolocation service failed.' :
'Error: Your browser doesn\'t support geolocation.');
}
DEMO
演示
回答by sren
I couldn't get the above code to work.
我无法让上面的代码工作。
Google does a great explanation though here: http://code.google.com/apis/maps/documentation/javascript/basics.html#DetectingUserLocation
谷歌在这里做了一个很好的解释：http: //code.google.com/apis/maps/documentation/javascript/basics.html#DetectingUserLocation
Where they first use the W3C Geolocation method and then offer the Google.gears fallback method for older browsers.
他们首先使用 W3C 地理定位方法，然后为旧浏览器提供 Google.gears 回退方法。
The example is here:
例子在这里：
http://code.google.com/apis/maps/documentation/javascript/examples/map-geolocation.html
http://code.google.com/apis/maps/documentation/javascript/examples/map-geolocation.html
回答by jmagnusson
No need to do your own implementation. I can recommend using geolocationmarkerfrom google-maps-utility-library-v3.
无需自己执行。我可以推荐使用geolocationmarkerfrom google-maps-utility-library-v3。
回答by Kris
It seems you now do not need to reverse geocode and now get the address directly from ClientLocation:
看来您现在不需要反向地理编码，现在直接从 ClientLocation 获取地址：
google.loader.ClientLocation.address.city
