问题
I'm using Google Maps JavaScript API v3 to generate a map with multiple locations/markers. I only have the address for these locations, not the coordinates, so I'm using the Geocoding API to get the coordinates.
I finally got Google's geocoding to work, so the location markers are showing up where they are supposed to be. However, the same content is showing up in every InfoWindow. I seem to be unable to pass the location arrays into the geocode function. (Incidentally, I also tried creating a variable for the geocode results and moving the infoWindow function outside of the geocode function, but I couldn't make that work either.)
I've tried this a hundred different ways already. I hoping someone else will see what I haven't been able to see.
var locations = [
['Location 1 Name', 'Location 1 Address', 'Location 1 URL'],
['Location 2 Name', 'Location 2 Address', 'Location 2 URL'],
['Location 3 Name', 'Location 3 Address', 'Location 3 URL']
];
geocoder = new google.maps.Geocoder();
for (i = 0; i < locations.length; i++) {
title = locations[i][0];
address = locations[i][1];
url = locations[i][2];
geocoder.geocode({ 'address' : locations[i][1] }, function(results, status) {
marker = new google.maps.Marker({
icon: 'marker_blue.png',
map: map,
position: results[0].geometry.location,
title: title,
animation: google.maps.Animation.DROP,
address: address,
url: url
})
infoWindow(marker, map, title, address, url);
})
}
function infoWindow(marker, map, title, address, url) {
google.maps.event.addListener(marker, 'click', function() {
var html = "<div><h3>" + title + "</h3><p>" + address + "<br></div><a href='" + url + "'>View location</a></p></div>";
iw = new google.maps.InfoWindow({ content : html, maxWidth : 350});
iw.open(map,marker);
});
}
回答1:
This is a duplicate of google map info window multiple addresses via xml, just not an exact duplicate. The geocoder is asynchronous, so when the geocoder callback runs, the value of address is that from the end of the loop for all the calls.
The answer is the same: The simplest solution is to use function closure to associate the call to the geocoder with the returned result:
function geocodeAddress(locations, i) {
var title = locations[i][0];
var address = locations[i][1];
var url = locations[i][2];
geocoder.geocode({
'address': locations[i][1]
},
function (results, status) {
if (status == google.maps.GeocoderStatus.OK) {
var marker = new google.maps.Marker({
icon: 'http://maps.google.com/mapfiles/ms/icons/blue.png',
map: map,
position: results[0].geometry.location,
title: title,
animation: google.maps.Animation.DROP,
address: address,
url: url
})
infoWindow(marker, map, title, address, url);
bounds.extend(marker.getPosition());
map.fitBounds(bounds);
} else {
alert("geocode of " + address + " failed:" + status);
}
});
}
Working fiddle
code snippet:
var locations = [
['Location 1 Name', 'New York, NY', 'Location 1 URL'],
['Location 2 Name', 'Newark, NJ', 'Location 2 URL'],
['Location 3 Name', 'Philadelphia, PA', 'Location 3 URL']
];
var geocoder;
var map;
var bounds = new google.maps.LatLngBounds();
function initialize() {
map = new google.maps.Map(
document.getElementById("map_canvas"), {
center: new google.maps.LatLng(37.4419, -122.1419),
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
geocoder = new google.maps.Geocoder();
for (i = 0; i < locations.length; i++) {
geocodeAddress(locations, i);
}
}
google.maps.event.addDomListener(window, "load", initialize);
function geocodeAddress(locations, i) {
var title = locations[i][0];
var address = locations[i][1];
var url = locations[i][2];
geocoder.geocode({
'address': locations[i][1]
},
function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
var marker = new google.maps.Marker({
icon: 'http://maps.google.com/mapfiles/ms/icons/blue.png',
map: map,
position: results[0].geometry.location,
title: title,
animation: google.maps.Animation.DROP,
address: address,
url: url
})
infoWindow(marker, map, title, address, url);
bounds.extend(marker.getPosition());
map.fitBounds(bounds);
} else {
alert("geocode of " + address + " failed:" + status);
}
});
}
function infoWindow(marker, map, title, address, url) {
google.maps.event.addListener(marker, 'click', function() {
var html = "<div><h3>" + title + "</h3><p>" + address + "<br></div><a href='" + url + "'>View location</a></p></div>";
iw = new google.maps.InfoWindow({
content: html,
maxWidth: 350
});
iw.open(map, marker);
});
}
function createMarker(results) {
var marker = new google.maps.Marker({
icon: 'http://maps.google.com/mapfiles/ms/icons/blue.png',
map: map,
position: results[0].geometry.location,
title: title,
animation: google.maps.Animation.DROP,
address: address,
url: url
})
bounds.extend(marker.getPosition());
map.fitBounds(bounds);
infoWindow(marker, map, title, address, url);
return marker;
}html,
body,
#map_canvas {
height: 100%;
width: 100%;
margin: 0px;
padding: 0px
}<script src="https://maps.googleapis.com/maps/api/js"></script>
<div id="map_canvas" style="border: 2px solid #3872ac;"></div>回答2:
Step-1
First you have to create map location for that like, where do you want to add this map on your web app. So first create JSP/HTML/ASP page in which you have to create location where you want to display the map.
<div id="map_canvas" style="width: 1350px; height: 500px"></div>
Step-2
Below I write the script using which you can see the map on your web application.
<script src="https://maps.googleapis.com/maps/api/js"></script>
<script type="text/javascript"
src="http://maps.google.com/maps/api/js?sensor=TRUEORFALSE"></script>
<script type="text/javascript">
var map;
var markers;
function initialize() {
$
.ajax({
type : "POST",
url : "Your Servlet Name", //Servlet Name
data : $("#FormID"),
success : function(responseJson) {
var result = $.parseJSON(responseJson);
markers = result;
// Below mapOptions var includes styling maps and zoom level of your map, it also includes mapTypeId.
var mapOptions = {
center : new google.maps.LatLng(
markers[0].latitude, markers[0].longitude),
zoom : 5,
scrollwheel: false,
styles : [ {
"featureType" : "administrative",
"elementType" : "labels.text.fill",
"stylers" : [ {
"color" : "#444444"
} ]
}, {
"featureType" : "landscape",
"elementType" : "all",
"stylers" : [ {
"color" : "#f2f2f2"
} ]
}, {
"featureType" : "poi",
"elementType" : "all",
"stylers" : [ {
"visibility" : "off"
} ]
}, {
"featureType" : "poi.park",
"elementType" : "geometry.fill",
"stylers" : [ {
"visibility" : "on"
}, {
"color" : "#1ba093"
} ]
}, {
"featureType" : "road",
"elementType" : "all",
"stylers" : [ {
"saturation" : -100
}, {
"lightness" : 45
} ]
}, {
"featureType" : "road.highway",
"elementType" : "all",
"stylers" : [ {
"visibility" : "simplified"
} ]
}, {
"featureType" : "road.arterial",
"elementType" : "labels.icon",
"stylers" : [ {
"visibility" : "off"
} ]
}, {
"featureType" : "transit",
"elementType" : "all",
"stylers" : [ {
"visibility" : "off"
} ]
}, {
"featureType" : "water",
"elementType" : "all",
"stylers" : [ {
"color" : "#00748c"
}, {
"visibility" : "on"
} ]
} ],
mapTypeId : google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document
.getElementById("map_canvas"), mapOptions);
addYourLocationButton(map,marker);
//Create and open InfoWindow.
var infoWindow = new google.maps.InfoWindow();
for (var i = 0; i < markers.length; i++) {
var data = markers[i];
var myLatlng = new google.maps.LatLng(
data.latitude, data.longitude);
var marker = new google.maps.Marker({
position : myLatlng,
animation: google.maps.Animation.DROP,
map : map,
title : //Any title that you want to display while cursor over the marker.
});
//Click event
(function(marker, data) {
google.maps.event
.addListener(
marker,
"click",
function(e) {
infoWindow
.setContent("<div style = 'width:300px;min-height:50px'>+Write information about your location if you want.+"</div>");
infoWindow
.open(map, marker);
});
})(marker, data);
}
}
});
}
来源：https://stackoverflow.com/questions/29463131/mapping-multiple-locations-with-google-maps-javascript-api-v3-and-geocoding-api