我已经处理了这几个小时,我仍然无法知道如何做到这一点。
我的目标是在搜索彼此靠近的地址时只显示一个标记。
下面你有我在我的html中使用的代码,以便搜索地址,注意 - 我正在开发一个这样做的Windows应用程序,在这种情况下,你可能会发现一些缺少的东西,通过单击按钮来执行操作,因为这是通过.NET Windows应用程序完成的
html代码
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<script type="text/javascript" src="http://maps.google.com.mx/maps/api/js?sensor=true&language=es"></script>
<script type="text/javascript">
var G = google.maps;
var map;
var geocoder = new G.Geocoder();
var marker;
var markersArray = [1];
function initialize() {
createMap();
geocode('Chicago');
}
function createMap() {
var myOptions = {
center: new G.LatLng(0,0),
zoom: 17,
mapTypeId: G.MapTypeId.ROADMAP
}
map = new G.Map(document.getElementById("map_canvas"), myOptions);
}
function geocode(address){
geocoder.geocode({ 'address': (address ? address : "Miami Beach, Florida")}, function (results, status) {
if (status == G.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);
marker = new G.Marker({
map: map,
animation: google.maps.Animation.DROP,
position: results[0].geometry.location
});
} else {
alert("Geocode was not successful for the following reason: " + status);
}
});
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:100%; height:100%"></div>
</body>
</html>
阅读以前的帖子我知道if / else语句必须使用但是不能正确使用。
非常感谢您的帮助。
Leo P。
答案 0 :(得分:3)
您可以在地理编码功能的开头添加一小段代码,在设置新标记之前删除之前的标记。试试这个:
function geocode(address){
if (marker) {
marker.setMap(null);
}
geocoder.geocode({ 'address': (address ? address : "Miami Beach, Florida")}, function (results, status) {
答案 1 :(得分:2)
仅创建一个标记作为全局变量,并根据需要更改其位置。这样你也节省了内存,因为你没有在每个请求上创建一个新的标记对象:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style>
html, body {width:100%; height:100%}
</style>
<script type="text/javascript" src="http://maps.google.com.mx/maps/api/js?sensor=true&language=es"></script>
<script type="text/javascript">
var G = google.maps;
var map;
var marker;
var geocoder = new G.Geocoder();
function initialize() {
createMap();
geocode('Chicago');
}
function createMap() {
var myOptions = {
center: new G.LatLng(0,0),
zoom: 17,
mapTypeId: G.MapTypeId.ROADMAP
}
map = new G.Map(document.getElementById("map_canvas"), myOptions);
// Create a single marker, (global variable), and don't give it a position just yet.
marker = new G.Marker({
map: map,
animation: google.maps.Animation.DROP,
});
}
function geocode(address){
geocoder.geocode({ 'address': (address ? address : "Miami Beach, Florida")}, function (results, status) {
if (status == G.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);
//Position the marker
marker.setPosition(results[0].geometry.location);
} else {
alert("Geocode was not successful for the following reason: " + status);
}
});
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:100%; height:100%"></div>
</body>
</html>