这是我的第一篇文章，如果之前有人问过，我很抱歉。
我有一个用户在移动设备上填写的表单，该表单使用 JavaScript 地理定位捕获经度和纬度。这并不总是最准确的，所以我尝试结合使用地理定位和谷歌地图可拖动图钉。
所以用户打开页面，地理定位在下面的脚本中输入当前的经度和纬度，如果错误，他们可以将图钉拖到正确的位置，从而更新文本字段。
我已经尝试了所有方法，但结果好坏参半...如果有人能帮助我，那就太好了。
我希望这是有道理的......如果不是我很乐意解释更多
下面的脚本使您能够拖动图钉并使用经度和纬度更新两个文本字段。
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>JS Bin</title>
</head>
<body>
<input type="text" id="latitude" placeholder="latitude">
<input type="text" id="longitude" placeholder="longitude">
<div id="map" style="width:500px; height:500px"></div>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
<script>
function initialize() {
var $latitude = document.getElementById('latitude');
var $longitude = document.getElementById('longitude');
var latitude = 50.715591133433854
var longitude = -3.53485107421875;
var zoom = 7;
var LatLng = new google.maps.LatLng(latitude, longitude);
var mapOptions = {
zoom: zoom,
center: LatLng,
panControl: false,
zoomControl: false,
scaleControl: true,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById('map'),mapOptions);
var marker = new google.maps.Marker({
position: LatLng,
map: map,
title: 'Drag Me!',
draggable: true
});
google.maps.event.addListener(marker, 'dragend', function(marker){
var latLng = marker.latLng;
$latitude.value = latLng.lat();
$longitude.value = latLng.lng();
});
}
initialize();
</script>
</body>
</html>最佳答案
<script src="http://maps.googleapis.com/maps/api/js"></script>
<script type="text/javascript">
function initialize() {
var map;
var position = new google.maps.LatLng(50.45, 4.45); // set your own default location.
var myOptions = {
zoom: 15,
center: position
};
var map = new google.maps.Map(document.getElementById("map-canvas"), myOptions);
// We send a request to search for the location of the user.
// If that location is found, we will zoom/pan to this place, and set a marker
navigator.geolocation.getCurrentPosition(locationFound, locationNotFound);
function locationFound(position) {
// we will zoom/pan to this place, and set a marker
var location = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
// var accuracy = position.coords.accuracy;
map.setCenter(location);
var marker = new google.maps.Marker({
position: location,
map: map,
draggable: true,
title: "You are here! Drag the marker to the exact location."
});
// set the value an value of the <input>
updateInput(location.lat(), location.lng());
// Add a "drag end" event handler
google.maps.event.addListener(marker, 'dragend', function() {
updateInput(this.position.lat(), this.position.lng());
});
}
function locationNotFound() {
// location not found, you might want to do something here
}
}
function updateInput(lat, lng) {
document.getElementById("my_location").value = lat + ',' + lng;
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
<style>
#map-canvas {
width: 500px;
height: 400px;
}
</style>
<div id="map-canvas"></div>
Location:<br>
<input id="my_location" readonly="readonly">
关于javascript - 谷歌地图获取可以通过拖动图钉更改的当前位置，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26887416/