使用Google Maps JavaScript API v3和Geocoding API映射多个位置

Question

我正在使用Google Maps JavaScript API v3生成包含多个位置/标记的地图.我只有这些位置的地址,而不是坐标,所以我使用地理编码API来获取坐标.

我终于让Google的地理编码工作了,所以位置标记显示出它们应该在的位置.但是,每个InfoWindow都会显示相同的内容.我好像无法将位置数组传递给地理编码功能.(顺便提一下,我也尝试为地理编码结果创建一个变量,并在地理编码功能之外移动infoWindow 函数,但我也无法做到这一点.)

我已经尝试了一百种不同的方法.我希望别人会看到我无法看到的东西.

    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);
        });
    }

Answer 1

这是谷歌地图信息窗口的重复通过xml多个地址,只是不完全重复.地理编码器是异步的,因此当地理编码器回调运行时,地址的值是从循环结束开始的所有调用.

答案是一样的:最简单的解决方案是使用函数闭包将对地理编码器的调用与返回的结果相关联:

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);
        }
    });
}

工作小提琴

代码段:

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>