javascript-使用Google Maps API进行地理编码-更新现有标记,而不添加其他标记
作者:互联网
在进行地址解析时,如何将现有标记简单地移动到新的地址解析结果中.
让我们来看这个例子:
>加载地图后,会出现一个标记
>有人进行地理编码时,标记将移至结果
>标记是可拖动的,因此用户可以进一步移动标记(如果需要)
>也许他们想对位置进行地理编码,所以新结果应自动移动现有标记.
在此示例中:
https://google-developers.appspot.com/maps/documentation/javascript/examples/geocoding-simple
…为每个新的地理编码绘制一个新的标记.
那有意义吗?
谢谢!!!
-米
解决方法:
>将标记设为全局.
>在创建一个新的之前检查它是否存在.
>如果存在,请使用.setPosition将其移动到新位置
>如果不存在,请在所需位置创建一个标记.
Example that does something close to what you want
工作代码段:
var map = null;
var marker = null;
var geocoder = new google.maps.Geocoder();
var infowindow = new google.maps.InfoWindow({pixelOffset: new google.maps.Size(0,-34)});
function initialize() {
map = new google.maps.Map(document.getElementById('map-canvas'), {
center: new google.maps.LatLng(42, -85),
zoom: 4
});
}
function codeAddress() {
var address = document.getElementById('address').value;
geocoder.geocode({
'address': address
}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);
content = results[0].formatted_address;
infowindow.setContent(content);
if (marker && marker.setPosition) {
marker.setPosition(results[0].geometry.location);
} else {
marker = new google.maps.Marker({
map: map,
icon: {
url: 'http://maps.google.com/mapfiles/arrow.png',
anchor: new google.maps.Point(10, 34)
},
position: results[0].geometry.location
});
google.maps.event.addListener(marker, 'click', function(evt) {
infowindow.open(map);
});
}
infowindow.setPosition(results[0].geometry.location);
infowindow.open(map);
} else {
alert('Your search was not successful for the following reason: ' + status);
}
});
}
google.maps.event.addDomListener(window, 'load', initialize);
html,
body,
#map-canvas {
height: 500px;
width: 500px;
margin: 0px;
padding: 0px
}
<script src="https://maps.googleapis.com/maps/api/js?v=3"></script>
<input id="address" value="New York, NY" />
<input id="geocode" type="button" value="Find" onclick="codeAddress()" />
<div id="map-canvas"></div>
标签:google-maps-api-3,geocode,javascript 来源: https://codeday.me/bug/20191031/1978785.html