Javascript 如何使用 API V3 每页显示多个 Google 地图

How to Display Multiple Google Maps per page with API V3

提问by Bill

I have the following script. And I want to make both maps appear on the page, but no matter what I try I can only get the first map initialize() to display... the second one doesn't. Any suggestions? (also, I can't add it in the code, but the first map is being displayed in <div id="map_canvas"></div><div id="route"></div>Thanks!

我有以下脚本。我想让两个地图都出现在页面上，但无论我尝试什么，我都只能让第一个地图 initialize() 显示......第二个没有。有什么建议？（另外，我无法在代码中添加它，但是第一张地图正在显示中<div id="map_canvas"></div><div id="route"></div>谢谢！

<script type="text/javascript"> 
// Create a directions object and register a map and DIV to hold the 
// resulting computed directions

var map;
var directionsPanel;
var directions;

function initialize() {
  map = new GMap(document.getElementById("map_canvas"));
  map.setCenter(new GLatLng(41.1255275,-73.6964801), 15);
  directionsPanel = document.getElementById("route");
  directions = new GDirections(map, directionsPanel);
  directions.load("from: Armonk Fire Department, Armonk NY to: <?php echo $LastCallGoogleAddress;?> ");

  map.addControl(new GSmallMapControl());
  map.addControl(new GMapTypeControl());
}

</script> 


<div id="map_canvas2" style="width:200px; height:200px;"></div>
<div id="route2"></div>

<script type="text/javascript"> 
// Create a directions object and register a map and DIV to hold the 
// resulting computed directions

var map2;
var directionsPanel2;
var directions2;

function initialize2() {
  map2 = new GMap(document.getElementById("map_canvas2"));
  map2.setCenter(new GLatLng(41.1255275,-73.6964801), 15);
  directionsPanel2 = document.getElementById("route2");
  directions2 = new GDirections(map2, directionsPanel2);
  directions2.load("from: ADDRESS1 to: ADDRESS2 ");

  map2.addControl(new GSmallMapControl());
  map2.addControl(new GMapTypeControl());
}

</script> 

<script type="text/javascript">
function loadmaps(){
    initialize();
    initialize2();  
}
</script>

回答by Philar

Here is how I have been able to generate multiple maps on the same page using Google Map API V3. Kindly note that this is an off the cuff code that addresses the issue above.

这是我如何使用Google Map API V3. 请注意，这是解决上述问题的袖口代码。

The HTML bit

HTML 位

<div id="map_canvas" style="width:700px; height:500px; margin-left:80px;"></div>
<div id="map_canvas2" style="width:700px; height:500px; margin-left:80px;"></div>

Javascript for map initialization

用于地图初始化的 Javascript

<script type="text/javascript">
var map, map2;

function initialize(condition) {
    // create the maps
    var myOptions = {
        zoom: 14,
        center: new google.maps.LatLng(0.0, 0.0),
        mapTypeId: google.maps.MapTypeId.ROADMAP
    }
    map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

    map2 = new google.maps.Map(document.getElementById("map_canvas2"), myOptions);
}
</script> 

回答by Sonny

I have just finished adding Google Maps to my company's CMS offering. My code allows for more than one map in a page.

我刚刚将 Google 地图添加到我公司的 CMS 产品中。我的代码允许一个页面中有多个地图。

Notes:

笔记：

• I use jQuery
• I put the address in the content and then parse it out to dynamically generate the map
• I include a Marker and an InfoWindow in my map

• 我使用 jQuery
• 我把地址放在内容里面然后解析出来动态生成地图
• 我在我的地图中包含了一个标记和一个信息窗口

HTML:

HTML：

<div class="block maps first">
    <div class="content">
        <div class="map_canvas">
            <div class="infotext">
                <div class="location">Middle East Bakery & Grocery</div>
                <div class="address">327 5th St</div>
                <div class="city">West Palm Beach</div>
                <div class="state">FL</div>
                <div class="zip">33401-3995</div>
                <div class="country">USA</div>
                <div class="phone">[phone]</div>
                <div class="zoom">14</div>
            </div>
        </div>
    </div>
</div>
<div class="block maps last">
    <div class="content">
        <div class="map_canvas">
            <div class="infotext">
                <div class="location">Global Design, Inc</div>
                <div class="address">3434 SW Ash Pl</div>
                <div class="city">Palm City</div>
                <div class="state">FL</div>
                <div class="zip">34990</div>
                <div class="country">USA</div>
                <div class="phone"></div>
                <div class="zoom">17</div>
            </div>
        </div>
    </div>
</div>

Code:

代码：

$(document).ready(function() {
    $maps = $('.block.maps .content .map_canvas');
    $maps.each(function(index, Element) {
        $infotext = $(Element).children('.infotext');

        var myOptions = {
            'zoom': parseInt($infotext.children('.zoom').text()),
            'mapTypeId': google.maps.MapTypeId.ROADMAP
        };
        var map;
        var geocoder;
        var marker;
        var infowindow;
        var address = $infotext.children('.address').text() + ', '
                + $infotext.children('.city').text() + ', '
                + $infotext.children('.state').text() + ' '
                + $infotext.children('.zip').text() + ', '
                + $infotext.children('.country').text()
        ;
        var content = '<strong>' + $infotext.children('.location').text() + '</strong><br />'
                + $infotext.children('.address').text() + '<br />'
                + $infotext.children('.city').text() + ', '
                + $infotext.children('.state').text() + ' '
                + $infotext.children('.zip').text()
        ;
        if (0 < $infotext.children('.phone').text().length) {
            content += '<br />' + $infotext.children('.phone').text();
        }

        geocoder = new google.maps.Geocoder();
        geocoder.geocode({'address': address}, function(results, status) {
            if (status == google.maps.GeocoderStatus.OK) {
                myOptions.center = results[0].geometry.location;
                map = new google.maps.Map(Element, myOptions);
                marker = new google.maps.Marker({
                    map: map,
                    position: results[0].geometry.location,
                    title: $infotext.children('.location').text()
                });
                infowindow = new google.maps.InfoWindow({'content': content});
                google.maps.event.addListener(map, 'tilesloaded', function(event) {
                    infowindow.open(map, marker);
                });
                google.maps.event.addListener(marker, 'click', function() {
                    infowindow.open(map, marker);
                });
            } else {
                alert('The address could not be found for the following reason: ' + status);
            }
        });
    });
});

回答by Daniel Hedenstr?m

OP wanted two specific maps, but if you'd like to have a dynamic number of maps on one page (for instance a list of retailer locations) you need to go another route. The standard implementation of Google maps API defines the map as a global variable, this won't work with a dynamic number of maps. Here's my code to solve this without global variables:

OP 需要两张特定的地图，但是如果您想在一页上拥有动态数量的地图（例如零售商位置列表），您需要走另一条路线。Google 地图 API 的标准实现将地图定义为全局变量，这不适用于动态数量的地图。这是我在没有全局变量的情况下解决此问题的代码：

function mapAddress(mapElement, address) {
var geocoder = new google.maps.Geocoder();

geocoder.geocode({ 'address': address }, function (results, status) {
    if (status == google.maps.GeocoderStatus.OK) {
        var mapOptions = {
            zoom: 14,
            center: results[0].geometry.location,
            disableDefaultUI: true
        };
        var map = new google.maps.Map(document.getElementById(mapElement), mapOptions);
        var marker = new google.maps.Marker({
            map: map,
            position: results[0].geometry.location
        });
    } else {
        alert("Geocode was not successful for the following reason: " + status);
    }
});
}

Just pass the ID and address of each map to the function to plot the map and mark the address.

只需将每个地图的 ID 和地址传递给函数即可绘制地图并标记地址。

回答by Justin Moore

Here's another example if you have the long and lat, in my case using Umbraco Google Map Datatype package and outputting a list of divs with class "map" eg.

这是另一个例子，如果你有 long 和 lat，在我的例子中使用 Umbraco Google Map Datatype 包并输出类“map”的 div 列表，例如。

<div class="map" id="UK">52.21454000000001,0.14044490000003407,13</div>

my JavaScript using Google Maps API v3 based on Cultiv Razor examples

我的 JavaScript 使用基于Cultiv Razor 示例的Google Maps API v3

$('.map').each(function (index, Element) {
    var coords = $(Element).text().split(",");
    if (coords.length != 3) {
        $(this).display = "none";
        return;
    }
    var latlng = new google.maps.LatLng(parseFloat(coords[0]), parseFloat(coords[1]));
    var myOptions = {
        zoom: parseFloat(coords[2]),
        center: latlng,
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        disableDefaultUI: false,
        mapTypeControl: true,
        zoomControl: true,
        zoomControlOptions: {
            style: google.maps.ZoomControlStyle.SMALL
        }
    };
    var map = new google.maps.Map(Element, myOptions);

    var marker = new google.maps.Marker({
        position: latlng,
        map: map
    });
});

回答by URL87

Taken from These examples - guide, implementation.

取自这些示例 -指南、实施。

1. set your <div>'s with the appropriate id
2. include the Google Map options with foundationcalling.
3. include foundationand remjs lib .

1. <div>使用适当的设置您的id
2. 包括带有foundation呼叫的 Google 地图选项。
3. 包括foundation和remjs lib 。

Example -

例子 -

index.html -

index.html -

<div class="row">
   <div class="large-6 medium-6 ">
      <div id="map_canvas" class="google-maps">
      </div>
   </div>
   <br>
   <div class="large-6 medium-6 ">
      <div id="map_canvas_2" class="google-maps"></div>
   </div>
</div>
<script src="/js/foundation.js"></script>
<script src="/js/google_maps_options.js"></script>
<script src="/js/rem.js"></script>
<script>
   jQuery(function(){
       setTimeout(initializeGoogleMap,700);
   });
</script>

google_maps_options.js -

google_maps_options.js -

function initializeGoogleMap()
{
    $(document).foundation();
    var latlng = new google.maps.LatLng(28.561287,-81.444465);
    var latlng2 = new google.maps.LatLng(28.507561,-81.482359);

    var myOptions =
    {
        zoom: 13,
        center: latlng,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    };

    var myOptions2 =
    {
        zoom: 13,
        center: latlng2,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    };


    var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

    var map2 = new google.maps.Map(document.getElementById("map_canvas_2"), myOptions2);


    var myMarker = new google.maps.Marker(
    {
        position: latlng,
        map: map,
        title:"Barnett Park"
   });

    var myMarker2 = new google.maps.Marker(
    {
        position: latlng2,
        map: map2,
        title:"Bill Fredrick Park at Turkey Lake"
    });


}

回答by fvrab

I needed to load dynamic number of google maps, with dynamic locations. So I ended up with something like this. Hope it helps. I add LatLng as data-attribute on map div.

我需要加载动态数量的谷歌地图，以及动态位置。所以我最终得到了这样的东西。希望能帮助到你。我在地图 div 上添加 LatLng 作为数据属性。

So, just create divs with class "maps". Every map canvas can than have a various IDs and LatLng like this. Of course you can set up various data attributes for zoom and so...

因此，只需创建带有“maps”类的 div。每个地图画布都可以像这样具有不同的 ID 和 LatLng。当然你可以设置各种数据属性进行缩放等等...

Maybe the code might be cleaner, but it works for me pretty well.

也许代码可能更清晰，但它对我来说效果很好。

<div id="map123" class="maps" data-gps="46.1461154,17.1580882"></div>
<div id="map456" class="maps" data-gps="45.1461154,13.1080882"></div>

  <script>
      var map;
      function initialize() {
        // Get all map canvas with ".maps" and store them to a variable.
        var maps = document.getElementsByClassName("maps");

        var ids, gps, mapId = '';

        // Loop: Explore all elements with ".maps" and create a new Google Map object for them
        for(var i=0; i<maps.length; i++) {

          // Get ID of single div
          mapId = document.getElementById(maps[i].id);

          // Get LatLng stored in data attribute. 
          // !!! Make sure there is no space in data-attribute !!!
          // !!! and the values are separated with comma !!!
          gps = mapId.getAttribute('data-gps');

          // Convert LatLng to an array
          gps = gps.split(",");

          // Create new Google Map object for single canvas 
          map = new google.maps.Map(mapId, {
            zoom: 15,
            // Use our LatLng array bellow
            center: new google.maps.LatLng(parseFloat(gps[0]), parseFloat(gps[1])),
            mapTypeId: 'roadmap',
            mapTypeControl: true,
            zoomControlOptions: {
                position: google.maps.ControlPosition.RIGHT_TOP
            }
          });

          // Create new Google Marker object for new map
          var marker = new google.maps.Marker({
            // Use our LatLng array bellow
            position: new google.maps.LatLng(parseFloat(gps[0]), parseFloat(gps[1])),
            map: map
          });
        }
      }
  </script>

回答by Anton Valintsev

You could try nex approach css

你可以试试 nex 方法 css

 .map {
            height: 300px;
            width: 100%;
        }

HTML

HTML

@foreach(var map in maps)
{
  <div id="[email protected]" lat="@map.Latitude" lng="@map.Longitude" class="map">
  </div>
}

JavaScript

JavaScript

 <script>
    var maps = [];
    var markers = [];
    function initMap() {
        var $maps = $('.map');
        $.each($maps, function (i, value) {
            var uluru = { lat: parseFloat($(value).attr('lat')), lng: parseFloat($(value).attr('lng')) };

            var mapDivId = $(value).attr('id');

            maps[mapDivId] = new google.maps.Map(document.getElementById(mapDivId), {
                zoom: 17,
                center: uluru
            });

            markers[mapDivId] = new google.maps.Marker({
                position: uluru,
                map: maps[mapDivId]
            });
        })
    }
</script>

<script async defer
        src="https://maps.googleapis.com/maps/api/js?language=ru-Ru&key=YOUR_KEY&callback=initMap">
</script>

回答by mattmoon9

You haven't defined a div with id="map_canvas", you only have id="map_canvas2" and id="route2". The div ids need to match the argument in the GMap() constructor.

您还没有定义 id="map_canvas" 的 div，您只有 id="map_canvas2" 和 id="route2"。div id 需要匹配 GMap() 构造函数中的参数。

回答by Afonso Pra?a

I had one especific issue, i had a Single Page App and needed to show different maps, in diferent divs, one each time. I solved it in not a very beautiful way but a functionally way. Instead of hide the DOM elements with displayproperty i used the visibilityproperty to do it. With this approach Google Maps API had no trouble about know the dimensions of the divs where i had instantiated the maps.

我有一个特定的问题，我有一个单页应用程序，需要在不同的 div 中显示不同的地图，每次一个。我不是以一种非常漂亮的方式而是以一种功能性的方式解决了它。我没有使用display属性隐藏 DOM 元素，而是使用了可见性属性来做到这一点。使用这种方法，Google Maps API 可以轻松知道我实例化地图的 div 的尺寸。

回答by Divyanshu Rawat

var maps_qty;
for (var i = 1; i <= maps_qty; i++)
    {
        $(".append_container").append('<div class="col-lg-10 grid_container_'+ (i) +'" >' + '<div id="googleMap'+ i +'" style="height:300px;"></div>'+'</div>');
        map = document.getElementById('googleMap' + i);
        initialize(map,i);
    }

// Intialize Google Map with Polyline Feature in it.

function initialize(map,i)
    {
        map_index = i-1;
        path_lat_long = [];
        var mapOptions = {
            zoom: 2,
            center: new google.maps.LatLng(51.508742,-0.120850)
        };

        var polyOptions = {
            strokeColor: '#000000',
            strokeOpacity: 1.0,
            strokeWeight: 3
        };

        //Push element(google map) in an array of google maps
        map_array.push(new google.maps.Map(map, mapOptions));
        //For Mapping polylines to MUltiple Google Maps
        polyline_array.push(new google.maps.Polyline(polyOptions));
        polyline_array[map_index].setMap(map_array[map_index]);
    }

// For Resizing Maps Multiple Maps.

google.maps.event.addListener(map, "idle", function()
    {
      google.maps.event.trigger(map, 'resize');
    });

map.setZoom( map.getZoom() - 1 );
map.setZoom( map.getZoom() + 1 );