javascript 允许用户在谷歌地图上放置标记
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Allow user to place marker on a google map
提问by LiamB
I'm looking for a way to allow a user to place a marker on a Google map and then get the co-ordinates so I can email them to a user.
我正在寻找一种方法，允许用户在 Google 地图上放置标记，然后获取坐标，以便我可以通过电子邮件将它们发送给用户。
Is it possible to allow users to do this on the fly? I've seen hereand understand I can do this using longitude and Latitude. So using the above method can I get a Longitude and Latitude from a users click?
是否可以允许用户即时执行此操作？我在这里看到并明白我可以使用经度和纬度来做到这一点。那么使用上述方法可以从用户点击中获得经度和纬度吗？
采纳答案by Tin Can
回答by Stefan Kovachev
You can achieve this using the following code:
您可以使用以下代码实现此目的：
google.maps.event.addListener(map, 'click', function( event ){
alert( "Latitude: "+event.latLng.lat()+" "+", longitude: "+event.latLng.lng() );
});
The mapvariable is your google.maps.Map instance. Every time the user clicks the map an alert box will display the coordinates of the place he clicked.
该map变量是您google.maps.Map实例。每次用户点击地图时，都会有一个警告框显示他点击的地点的坐标。
回答by m-tech
<!DOCTYPE html>
<html>
<body>
<div id="googleMap" style="width:100%;height:400px;"></div>
<script>
function myMap() {
var mapProp= {
center:new google.maps.LatLng(51.508742,-0.120850),
zoom:5,
};
var map=new google.maps.Map(document.getElementById("googleMap"),mapProp);
google.maps.event.addListener(map, 'click', function(event) {
alert(event.latLng.lat() + ", " + event.latLng.lng());
});
}
</script>
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBu-916DdpKAjTmJNIgngS6HL_kDIKU0aU&callback=myMap"></script>
</body>
</html>
