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

lacoder 发表于 Dev

编码器

我正在使用Google Maps JavaScript API v3生成具有多个位置/标记的地图。我只有这些位置的地址，而没有坐标，因此我正在使用Geocoding API获取坐标。

我终于可以使用Google的地理编码，因此位置标记会显示在原先的位置。但是，每个InfoWindow中都显示相同的内容。我似乎无法将位置数组传递到地址解析功能中。（顺便说一句，我也尝试过为地址解析结果创建一个变量，并将infoWindow函数移至地址解析功能之外，但我也无法做到这一点。）

我已经尝试了一百种不同的方法。我希望别人能看到我以前看不到的东西。

    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);
        });
    }

地理编码

这是google map信息窗口通过xml的多个地址的重复，只是不完全相同。地址解析器是异步的，因此当地址解析器回调运行时，地址的值是所有调用从循环结束起的值。

答案是相同的：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?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></script>
<div id="map_canvas" style="border: 2px solid #3872ac;"></div>

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