Google Maps JS API v3 - 简单的多标记示例
Google Maps Api 相当新。我有一组数据，我想循环浏览并在地图上绘制。看起来相当简单，但我发现的所有多标记教程都相当复杂。
让我们以谷歌网站的数据数组为例：
var locations = [
['Bondi Beach', -33.890542, 151.274856, 4],
['Coogee Beach', -33.923036, 151.259052, 5],
['Cronulla Beach', -34.028249, 151.157507, 3],
['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
['Maroubra Beach', -33.950198, 151.259302, 1]
];
我只想绘制所有这些点，并在单击以显示名称时弹出 infoWindow。
这是我可以将其简化为的最简单的方法：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<title>Google Maps Multiple Markers</title>
<script src="http://maps.google.com/maps/api/js?key=YOUR_API_KEY"
type="text/javascript"></script>
</head>
<body>
<div id="map" style="width: 500px; height: 400px;"></div>
<script type="text/javascript">
var locations = [
['Bondi Beach', -33.890542, 151.274856, 4],
['Coogee Beach', -33.923036, 151.259052, 5],
['Cronulla Beach', -34.028249, 151.157507, 3],
['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
['Maroubra Beach', -33.950198, 151.259302, 1]
];
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 10,
center: new google.maps.LatLng(-33.92, 151.25),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var infowindow = new google.maps.InfoWindow();
var marker, i;
for (i = 0; i < locations.length; i++) {
marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[i][1], locations[i][2]),
map: map
});
google.maps.event.addListener(marker, 'click', (function(marker, i) {
return function() {
infowindow.setContent(locations[i][0]);
infowindow.open(map, marker);
}
})(marker, i));
}
</script>
</body>
</html>
👨💻 在 Codepen 上编辑/分叉 →
截屏
https://i.imgur.com/mM82YXg.png
将回调参数传递给 addListener 方法时，会发生一些关闭魔术。如果您不熟悉闭包的工作原理，这可能是一个相当棘手的话题。如果是这种情况，我建议查看以下 Mozilla 文章以获得简要介绍：
❯ Mozilla Dev Center: Working with Closures
这是另一个使用唯一 title 和 infoWindow 文本加载多个标记的示例。使用最新的谷歌地图 API V3.11 测试。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>Multiple Markers Google Maps</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<script src="https://maps.googleapis.com/maps/api/js?v=3.11&sensor=false" type="text/javascript"></script>
<script type="text/javascript">
// check DOM Ready
$(document).ready(function() {
// execute
(function() {
// map options
var options = {
zoom: 5,
center: new google.maps.LatLng(39.909736, -98.522109), // centered US
mapTypeId: google.maps.MapTypeId.TERRAIN,
mapTypeControl: false
};
// init map
var map = new google.maps.Map(document.getElementById('map_canvas'), options);
// NY and CA sample Lat / Lng
var southWest = new google.maps.LatLng(40.744656, -74.005966);
var northEast = new google.maps.LatLng(34.052234, -118.243685);
var lngSpan = northEast.lng() - southWest.lng();
var latSpan = northEast.lat() - southWest.lat();
// set multiple marker
for (var i = 0; i < 250; i++) {
// init markers
var marker = new google.maps.Marker({
position: new google.maps.LatLng(southWest.lat() + latSpan * Math.random(), southWest.lng() + lngSpan * Math.random()),
map: map,
title: 'Click Me ' + i
});
// process multiple info windows
(function(marker, i) {
// add click event
google.maps.event.addListener(marker, 'click', function() {
infowindow = new google.maps.InfoWindow({
content: 'Hello, World!!'
});
infowindow.open(map, marker);
});
})(marker, i);
}
})();
});
</script>
</head>
<body>
<div id="map_canvas" style="width: 800px; height:500px;"></div>
</body>
</html>
250 个标记的屏幕截图：
https://i.stack.imgur.com/D167A.png
它将自动随机化 Lat/Lng 以使其独一无二。如果您想测试 500、1000、xxx 标记和性能，此示例将非常有帮助。
infoWindow，并且不会隐藏当前显示的另一个 infoWindow。这真的很有帮助:)
new MarkerClusterer() 来大幅降低性能？查看 ChirsSwires 的答案。
我想我会把它放在这里，因为对于那些开始使用 Google Maps API 的人来说，它似乎是一个受欢迎的着陆点。在客户端呈现多个标记可能是许多地图应用程序性能方面的失败。很难进行基准测试、修复甚至在某些情况下确定存在问题（由于浏览器实现差异、客户端可用的硬件、移动设备等等）。
开始解决此问题的最简单方法是使用标记聚类解决方案。基本思想是将地理上相似的位置分组到一个组中，并显示点数。当用户放大地图时，这些组会展开以显示下方的各个标记。
最简单的实现可能是 markerclusterer 库。一个基本的实现如下（在库导入之后）：
<script type="text/javascript">
function initialize() {
var center = new google.maps.LatLng(37.4419, -122.1419);
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 3,
center: center,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var markers = [];
for (var i = 0; i < 100; i++) {
var location = yourData.location[i];
var latLng = new google.maps.LatLng(location.latitude,
location.longitude);
var marker = new google.maps.Marker({
position: latLng
});
markers.push(marker);
}
var markerCluster = new MarkerClusterer({map, markers});
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
标记而不是直接添加到地图中，而是添加到数组中。然后将该数组传递给为您处理复杂计算并附加到地图的库。
这些实现不仅极大地提高了客户端性能，而且在许多情况下，它们还导致 UI 更简单、更简洁，并且更容易消化更大规模的数据。
Other implementations 可从 Google 获得。
希望这有助于一些新的映射细微差别的人。
异步版本：
<script type="text/javascript">
function initialize() {
var locations = [
['Bondi Beach', -33.890542, 151.274856, 4],
['Coogee Beach', -33.923036, 151.259052, 5],
['Cronulla Beach', -34.028249, 151.157507, 3],
['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
['Maroubra Beach', -33.950198, 151.259302, 1]
];
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 10,
center: new google.maps.LatLng(-33.92, 151.25),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var infowindow = new google.maps.InfoWindow();
var marker, i;
for (i = 0; i < locations.length; i++) {
marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[i][1], locations[i][2]),
map: map
});
google.maps.event.addListener(marker, 'click', (function(marker, i) {
return function() {
infowindow.setContent(locations[i][0]);
infowindow.open(map, marker);
}
})(marker, i));
}
}
function loadScript() {
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = 'https://maps.googleapis.com/maps/api/js?v=3.exp&' +
'callback=initialize';
document.body.appendChild(script);
}
window.onload = loadScript;
</script>
https://i.stack.imgur.com/b3wN2.png
var arr = new Array();
function initialize() {
var i;
var Locations = [
{
lat:48.856614,
lon:2.3522219000000177,
address:'Paris',
gval:'25.5',
aType:'Non-Commodity',
title:'Paris',
descr:'Paris'
},
{
lat: 55.7512419,
lon: 37.6184217,
address:'Moscow',
gval:'11.5',
aType:'Non-Commodity',
title:'Moscow',
descr:'Moscow Airport'
},
{
lat:-9.481553000000002,
lon:147.190242,
address:'Port Moresby',
gval:'1',
aType:'Oil',
title:'Papua New Guinea',
descr:'Papua New Guinea 123123123'
},
{
lat:20.5200,
lon:77.7500,
address:'Indore',
gval:'1',
aType:'Oil',
title:'Indore, India',
descr:'Airport India'
}
];
var myOptions = {
zoom: 2,
center: new google.maps.LatLng(51.9000,8.4731),
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map"), myOptions);
var infowindow = new google.maps.InfoWindow({
content: ''
});
for (i = 0; i < Locations.length; i++) {
size=15;
var img=new google.maps.MarkerImage('marker.png',
new google.maps.Size(size, size),
new google.maps.Point(0,0),
new google.maps.Point(size/2, size/2)
);
var marker = new google.maps.Marker({
map: map,
title: Locations[i].title,
position: new google.maps.LatLng(Locations[i].lat, Locations[i].lon),
icon: img
});
bindInfoWindow(marker, map, infowindow, "<p>" + Locations[i].descr + "</p>",Locations[i].title);
}
}
function bindInfoWindow(marker, map, infowindow, html, Ltitle) {
google.maps.event.addListener(marker, 'mouseover', function() {
infowindow.setContent(html);
infowindow.open(map, marker);
});
google.maps.event.addListener(marker, 'mouseout', function() {
infowindow.close();
});
}
完整的工作示例。您可以复制、粘贴和使用。
function initialize() {
var myOptions = {
zoom: 10,
center: new google.maps.LatLng(-33.9, 151.2),
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
setMarkers(map, beaches);
}
/**
* Data for the markers consisting of a name, a LatLng and a zIndex for
* the order in which these markers should display on top of each
* other.
*/
var beaches = [
['Bondi Beach', -33.890542, 151.274856, 4],
['Coogee Beach', -33.923036, 151.259052, 5],
['Cronulla Beach', -34.028249, 151.157507, 3],
['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
['Maroubra Beach', -33.950198, 151.259302, 1]
];
function setMarkers(map, locations) {
// Add markers to the map
// Marker sizes are expressed as a Size of X,Y
// where the origin of the image (0,0) is located
// in the top left of the image.
// Origins, anchor positions and coordinates of the marker
// increase in the X direction to the right and in
// the Y direction down.
var image = new google.maps.MarkerImage('images/beachflag.png',
// This marker is 20 pixels wide by 32 pixels tall.
new google.maps.Size(20, 32),
// The origin for this image is 0,0.
new google.maps.Point(0,0),
// The anchor for this image is the base of the flagpole at 0,32.
new google.maps.Point(0, 32));
var shadow = new google.maps.MarkerImage('images/beachflag_shadow.png',
// The shadow image is larger in the horizontal dimension
// while the position and offset are the same as for the main image.
new google.maps.Size(37, 32),
new google.maps.Point(0,0),
new google.maps.Point(0, 32));
// Shapes define the clickable region of the icon.
// The type defines an HTML <area> element 'poly' which
// traces out a polygon as a series of X,Y points. The final
// coordinate closes the poly by connecting to the first
// coordinate.
var shape = {
coord: [1, 1, 1, 20, 18, 20, 18 , 1],
type: 'poly'
};
for (var i = 0; i < locations.length; i++) {
var beach = locations[i];
var myLatLng = new google.maps.LatLng(beach[1], beach[2]);
var marker = new google.maps.Marker({
position: myLatLng,
map: map,
shadow: shadow,
icon: image,
shape: shape,
title: beach[0],
zIndex: beach[3]
});
}
}
这是我为保存地图空间而编写的另一个版本，它将信息窗口指针放在标记的实际纬度和经度上，同时在显示信息窗口时暂时隐藏标记。
它还取消了标准的“标记”分配，并通过在标记创建时将新标记直接分配给标记数组来加快处理速度。但是请注意，标记和信息窗口都添加了额外的属性，所以这种方法有点不合常规......但这就是我！
在这些信息窗口问题中从未提到标准信息窗口不是放置在标记点的纬度和经度，而是放置在标记图像的顶部。必须隐藏标记可见性才能使其正常工作，否则 Maps API 会将信息窗口锚再次推回标记图像的顶部。
在标记声明后立即创建对“标记”数组中标记的引用，用于以后可能需要的任何其他处理任务（隐藏/显示、抓取坐标等）。这节省了将标记对象分配给“标记”，然后将“标记”推送到标记数组的额外步骤......在我的书中有很多不必要的处理。
无论如何，对 infowindows 的不同看法，希望它有助于通知和启发您。
var locations = [
['Bondi Beach', -33.890542, 151.274856, 4],
['Coogee Beach', -33.923036, 151.259052, 5],
['Cronulla Beach', -34.028249, 151.157507, 3],
['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
['Maroubra Beach', -33.950198, 151.259302, 1]
];
var map;
var markers = [];
function init(){
map = new google.maps.Map(document.getElementById('map_canvas'), {
zoom: 10,
center: new google.maps.LatLng(-33.92, 151.25),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var num_markers = locations.length;
for (var i = 0; i < num_markers; i++) {
markers[i] = new google.maps.Marker({
position: {lat:locations[i][1], lng:locations[i][2]},
map: map,
html: locations[i][0],
id: i,
});
google.maps.event.addListener(markers[i], 'click', function(){
var infowindow = new google.maps.InfoWindow({
id: this.id,
content:this.html,
position:this.getPosition()
});
google.maps.event.addListenerOnce(infowindow, 'closeclick', function(){
markers[this.id].setVisible(true);
});
this.setVisible(false);
infowindow.open(map);
});
}
}
google.maps.event.addDomListener(window, 'load', init);
这是一个working JSFiddle
附加说明 您会注意到，在这个给定的 Google 示例数据中，'locations' 数组中的第四个位置带有一个数字。鉴于示例中的这一点，您还可以使用此值作为标记 id 来代替当前循环值，这样......
var num_markers = locations.length;
for (var i = 0; i < num_markers; i++) {
markers[i] = new google.maps.Marker({
position: {lat:locations[i][1], lng:locations[i][2]},
map: map,
html: locations[i][0],
id: locations[i][3],
});
};
接受的答案，用 ES6 重写：
$(document).ready(() => {
const mapEl = $('#our_map').get(0); // OR document.getElementById('our_map');
// Display a map on the page
const map = new google.maps.Map(mapEl, { mapTypeId: 'roadmap' });
const buildings = [
{
title: 'London Eye, London',
coordinates: [51.503454, -0.119562],
info: 'carousel'
},
{
title: 'Palace of Westminster, London',
coordinates: [51.499633, -0.124755],
info: 'palace'
}
];
placeBuildingsOnMap(buildings, map);
});
const placeBuildingsOnMap = (buildings, map) => {
// Loop through our array of buildings & place each one on the map
const bounds = new google.maps.LatLngBounds();
buildings.forEach((building) => {
const position = { lat: building.coordinates[0], lng: building.coordinates[1] }
// Stretch our bounds to the newly found marker position
bounds.extend(position);
const marker = new google.maps.Marker({
position: position,
map: map,
title: building.title
});
const infoWindow = new google.maps.InfoWindow();
// Allow each marker to have an info window
google.maps.event.addListener(marker, 'click', () => {
infoWindow.setContent(building.info);
infoWindow.open(map, marker);
})
// Automatically center the map fitting all markers on the screen
map.fitBounds(bounds);
})
})
在您的程序中添加标记非常容易。您只需添加以下代码：
var marker = new google.maps.Marker({
position: myLatLng,
map: map,
title: 'Hello World!'
});
当您构建标记时，以下字段特别重要且通常设置：
position（必需）指定标识标记的初始位置的 LatLng。检索 LatLng 的一种方法是使用地理编码服务。
map（可选）指定放置标记的地图。如果您未指定构建标记的地图，则会创建标记但不会附加到地图（或显示在地图上）。您可以稍后通过调用标记的 setMap() 方法来添加标记。
请注意，在示例中，标题字段设置了标记的标题，该标题将显示为工具提示。
您可以查阅 Google api 文档 here。
这是在地图中设置 one 标记的完整示例。请注意，您必须将 YOUR_API_KEY 替换为 google API key：
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Simple markers</title>
<style>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
function initMap() {
var myLatLng = {lat: -25.363, lng: 131.044};
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 4,
center: myLatLng
});
var marker = new google.maps.Marker({
position: myLatLng,
map: map,
title: 'Hello World!'
});
}
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
</script>
现在，如果你想在地图中绘制数组的标记，你应该这样做：
var locations = [
['Bondi Beach', -33.890542, 151.274856, 4],
['Coogee Beach', -33.923036, 151.259052, 5],
['Cronulla Beach', -34.028249, 151.157507, 3],
['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
['Maroubra Beach', -33.950198, 151.259302, 1]
];
function initMap() {
var myLatLng = {lat: -33.90, lng: 151.16};
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 10,
center: myLatLng
});
var count;
for (count = 0; count < locations.length; count++) {
new google.maps.Marker({
position: new google.maps.LatLng(locations[count][1], locations[count][2]),
map: map,
title: locations[count][0]
});
}
}
这个例子给了我以下结果：
https://i.stack.imgur.com/hlnj2.png
您还可以在您的 pin 中添加一个 infoWindow。你只需要这段代码：
var marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[count][1], locations[count][2]),
map: map
});
marker.info = new google.maps.InfoWindow({
content: 'Hello World!'
});
您可以获取有关 infoWindows here 的 Google 文档。
现在，我们可以在标记为“点击”时打开 infoWindow，如下所示：
var marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[count][1], locations[count][2]),
map: map
});
marker.info = new google.maps.InfoWindow({
content: locations [count][0]
});
google.maps.event.addListener(marker, 'click', function() {
// this = marker
var marker_map = this.getMap();
this.info.open(marker_map, this);
// Note: If you call open() without passing a marker, the InfoWindow will use the position specified upon construction through the InfoWindowOptions object literal.
});
注意，您可以在 google developer 中找到一些关于 Listener here 的文档。
最后，如果用户单击它，我们可以在标记中绘制一个 infoWindow。这是我的完整代码：
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Info windows</title>
<style>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
var locations = [
['Bondi Beach', -33.890542, 151.274856, 4],
['Coogee Beach', -33.923036, 151.259052, 5],
['Cronulla Beach', -34.028249, 151.157507, 3],
['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
['Maroubra Beach', -33.950198, 151.259302, 1]
];
// When the user clicks the marker, an info window opens.
function initMap() {
var myLatLng = {lat: -33.90, lng: 151.16};
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 10,
center: myLatLng
});
var count=0;
for (count = 0; count < locations.length; count++) {
var marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[count][1], locations[count][2]),
map: map
});
marker.info = new google.maps.InfoWindow({
content: locations [count][0]
});
google.maps.event.addListener(marker, 'click', function() {
// this = marker
var marker_map = this.getMap();
this.info.open(marker_map, this);
// Note: If you call open() without passing a marker, the InfoWindow will use the position specified upon construction through the InfoWindowOptions object literal.
});
}
}
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
</script>
</body>
</html>
通常，您应该得到以下结果：
https://i.stack.imgur.com/AJyS9.png
来源Link
演示Link
完整的 HTML 代码
单击或悬停时显示信息窗口。
只会显示一个信息窗口
https://i.stack.imgur.com/V8j8v.jpg
<!DOCTYPE html>
<html>
<head>
<style>
/* <span class="metadata-marker" style="display: none;" data-region_tag="css"></span> Set the size of the div element that contains the map */
#map {
height: 400px;
/* The height is 400 pixels */
width: 100%;
/* The width is the width of the web page */
}
</style>
<script>
var map;
var InforObj = [];
var centerCords = {
lat: -25.344,
lng: 131.036
};
var markersOnMap = [{
placeName: "Australia (Uluru)",
LatLng: [{
lat: -25.344,
lng: 131.036
}]
},
{
placeName: "Australia (Melbourne)",
LatLng: [{
lat: -37.852086,
lng: 504.985963
}]
},
{
placeName: "Australia (Canberra)",
LatLng: [{
lat: -35.299085,
lng: 509.109615
}]
},
{
placeName: "Australia (Gold Coast)",
LatLng: [{
lat: -28.013044,
lng: 513.425586
}]
},
{
placeName: "Australia (Perth)",
LatLng: [{
lat: -31.951994,
lng: 475.858081
}]
}
];
window.onload = function () {
initMap();
};
function addMarkerInfo() {
for (var i = 0; i < markersOnMap.length; i++) {
var contentString = '<div id="content"><h1>' + markersOnMap[i].placeName +
'</h1><p>Lorem ipsum dolor sit amet, vix mutat posse suscipit id, vel ea tantas omittam detraxit.</p></div>';
const marker = new google.maps.Marker({
position: markersOnMap[i].LatLng[0],
map: map
});
const infowindow = new google.maps.InfoWindow({
content: contentString,
maxWidth: 200
});
marker.addListener('click', function () {
closeOtherInfo();
infowindow.open(marker.get('map'), marker);
InforObj[0] = infowindow;
});
// marker.addListener('mouseover', function () {
// closeOtherInfo();
// infowindow.open(marker.get('map'), marker);
// InforObj[0] = infowindow;
// });
// marker.addListener('mouseout', function () {
// closeOtherInfo();
// infowindow.close();
// InforObj[0] = infowindow;
// });
}
}
function closeOtherInfo() {
if (InforObj.length > 0) {
/* detach the info-window from the marker ... undocumented in the API docs */
InforObj[0].set("marker", null);
/* and close it */
InforObj[0].close();
/* blank the array */
InforObj.length = 0;
}
}
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
zoom: 4,
center: centerCords
});
addMarkerInfo();
}
</script>
</head>
<body>
<h3>My Google Maps Demo</h3>
<!--The div element for the map -->
<div id="map"></div>
<script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY"></script>
</body>
</html>
closeOtherInfo，在您回答之前，我找不到合适的解决方案来使用 merkercluster。 :)
继 Daniel Vassallo's answer 之后，这是一个以更简单的方式处理关闭问题的版本。
由于所有标记都有一个单独的 InfoWindow 并且 JavaScript 不关心是否向对象添加额外的属性，因此您需要做的就是将 InfoWindow 添加到Marker 的 属性，然后从自身调用 InfoWindow 上的 .open()！
编辑：如果有足够的数据，页面加载可能会花费大量时间，因此与其使用标记构建 InfoWindow，不如仅在需要时进行构建。请注意，用于构造 InfoWindow 的任何数据都必须作为属性 (data) 附加到 Marker。另请注意，在第一次点击事件之后，infoWindow 将作为其标记的属性持续存在，因此浏览器不需要不断地重建。
var locations = [
['Bondi Beach', -33.890542, 151.274856, 4],
['Coogee Beach', -33.923036, 151.259052, 5],
['Cronulla Beach', -34.028249, 151.157507, 3],
['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
['Maroubra Beach', -33.950198, 151.259302, 1]
];
var map = new google.maps.Map(document.getElementById('map'), {
center: new google.maps.LatLng(-33.92, 151.25)
});
for (i = 0; i < locations.length; i++) {
marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[i][1], locations[i][2]),
map: map,
data: {
name: locations[i][0]
}
});
marker.addListener('click', function() {
if(!this.infoWindow) {
this.infoWindow = new google.maps.InfoWindow({
content: this.data.name;
});
}
this.infoWindow.open(map,this);
})
}
我知道这个答案已经很晚了。但我希望这也能帮助其他开发人员。 :-)
以下代码将在带有信息窗口的谷歌地图上添加多个标记。
此代码可用于在地图上绘制任意数量的标记。
请将您的 Google Map API 密钥放在此代码的正确位置。 （我已将其标记为“您的 API 密钥”）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>My Google Map</title>
<style>
#map{
height: 600px;
width: 100%;
}
</style>
</head>
<body>
<h1>My Google Map`</h1>
<div id="map"></div>
<script>
function initMap(){
//Map options
var options = {
zoom:9,
center:{lat:42.3601, lng:-71.0589}
}
// new map
var map = new google.maps.Map(document.getElementById('map'), options);
// customer marker
var iconBase = 'https://maps.google.com/mapfiles/kml/shapes/parking_lot_maps.png';
//array of Marrkeers
var markers = [
{
coords:{lat: 42.4668, lng: -70.9495},img:iconBase,con:'<h3> This Is your Content <h3>'
},
{
coords:{lat: 42.8584, lng: -70.9300},img:iconBase,con:'<h3> This Is your Content <h3>'
},
{
coords:{lat: 42.7762, lng: -71.0773},img:iconBase,con:'<h3> This Is your Content <h3>'
}
];
//loopthrough markers
for(var i = 0; i <markers.length; i++){
//add markeers
addMarker(markers[i]);
}
//function for the plotting markers on the map
function addMarker (props){
var marker = new google.maps.Marker({
position: props.coords,
map:map,
icon:props.img
});
var infoWindow = new google.maps.InfoWindow({
content:props.con,
});
marker.addListener("click", () => {
infoWindow.open(map, marker);
});
}
}
</script>
<script
src="https://maps.googleapis.com/maps/api/js?key=**YourAPIKey**&callback=initMap"
defer
></script>
</body>
</html>
这是一个几乎完整的示例 javascript 函数，它允许在 JSONObject 中定义多个标记。
它只会显示地图边界内的标记。
这很重要，因此您不会做额外的工作。
您还可以对标记设置限制，这样您就不会显示过多的标记（如果您的使用中有可能发生某件事）；
如果地图中心的变化不超过 500 米，它也不会显示标记。这很重要，因为如果用户单击标记并在这样做时意外拖动地图，您不希望地图重新加载标记。
我将此函数附加到地图的空闲事件侦听器，因此标记仅在地图空闲时显示，并在不同事件后重新显示标记。
https://i.stack.imgur.com/ozxS7.png
这是多个 markers in Reactjs 的示例。
https://i.stack.imgur.com/kagR7.jpg
下面是地图组件
import React from 'react';
import PropTypes from 'prop-types';
import { Map, InfoWindow, Marker, GoogleApiWrapper } from 'google-maps-react';
const MapContainer = (props) => {
const [mapConfigurations, setMapConfigurations] = useState({
showingInfoWindow: false,
activeMarker: {},
selectedPlace: {}
});
var points = [
{ lat: 42.02, lng: -77.01 },
{ lat: 42.03, lng: -77.02 },
{ lat: 41.03, lng: -77.04 },
{ lat: 42.05, lng: -77.02 }
]
const onMarkerClick = (newProps, marker) => {};
if (!props.google) {
return <div>Loading...</div>;
}
return (
<div className="custom-map-container">
<Map
style={{
minWidth: '200px',
minHeight: '140px',
width: '100%',
height: '100%',
position: 'relative'
}}
initialCenter={{
lat: 42.39,
lng: -72.52
}}
google={props.google}
zoom={16}
>
{points.map(coordinates => (
<Marker
position={{ lat: coordinates.lat, lng: coordinates.lng }}
onClick={onMarkerClick}
icon={{
url: 'https://res.cloudinary.com/mybukka/image/upload/c_scale,r_50,w_30,h_30/v1580550858/yaiwq492u1lwuy2lb9ua.png',
anchor: new google.maps.Point(32, 32), // eslint-disable-line
scaledSize: new google.maps.Size(30, 30) // eslint-disable-line
}}
name={name}
/>))}
<InfoWindow
marker={mapConfigurations.activeMarker}
visible={mapConfigurations.showingInfoWindow}
>
<div>
<h1>{mapConfigurations.selectedPlace.name}</h1>
</div>
</InfoWindow>
</Map>
</div>
);
};
export default GoogleApiWrapper({
apiKey: process.env.GOOGLE_API_KEY,
v: '3'
})(MapContainer);
MapContainer.propTypes = {
google: PropTypes.shape({}).isRequired,
};
在当前地图标记和聚类算法中修改后最近最简单的：
修改：https://developers.google.com/maps/documentation/javascript/marker-clustering
https://i.stack.imgur.com/tc8oM.jpg
<!DOCTYPE Html>
<html>
<head>
<meta Content-Security-Policy="default-src 'self'; script-src 'self' 'unsafe-eval' https://*/;">
<link type="text/css" href="http://www.mapsmarker.com/wp-content/uploads/leaflet-maps-marker-icons/bar_coktail.png">
<link rel="icon" href="data:,">
<title>App</title>
</head>
<style type="text/css">
#map {
height: 500
}
</style>
<body>
<div id='map' style="width:100%; height:400px"></div>
<script type='text/javascript'>
function initMap() {
maps = new google.maps.Map(document.getElementById('map'), {
center: new google.maps.LatLng(12.9824855, 77.637094),
zoom: 5,
disableDefaultUI: false,
mapTypeId: google.maps.MapTypeId.HYBRID
});
var labels='ABCDEFGHIJKLMNOPQRSTUVWXYZ';
var markerImage = 'http://www.mapsmarker.com/wp-content/uploads/leaflet-maps-marker-icons/bar_coktail.png';
marker = locations.map(function (location, i) {
return new google.maps.Marker({
position: new google.maps.LatLng(location.lat, location.lng),
map: maps,
title: "Map",
label: labels[i % labels.length],
icon: markerImage
});
});
var markerCluster = new MarkerClusterer(maps, marker, {
imagePath: 'https://developers.google.com/maps/documentation/javascript/examples/markerclusterer/m'
});
}
var locations = [
{ lat: 12.9824855, lng: 77.637094},
{ lat: 11.9824855, lng: 77.154312 },
{ lat: 12.8824855, lng: 77.637094},
{ lat: 10.8824855, lng: 77.054312 },
{ lat: 12.9824855, lng: 77.637094},
{ lat: 11.9824855, lng: 77.154312 },
{ lat: 12.8824855, lng: 77.637094},
{ lat: 13.8824855, lng: 77.054312 },
{ lat: 14.9824855, lng: 54.637094},
{ lat: 15.9824855, lng: 54.154312 },
{ lat: 16.8824855, lng: 53.637094},
{ lat: 17.8824855, lng: 52.054312 },
{ lat: 18.9824855, lng: 51.637094},
{ lat: 19.9824855, lng: 69.154312 },
{ lat: 20.8824855, lng: 68.637094},
{ lat: 21.8824855, lng: 67.054312 },
{ lat: 12.9824855, lng: 76.637094},
{ lat: 11.9824855, lng: 75.154312 },
{ lat: 12.8824855, lng: 74.637094},
{ lat: 10.8824855, lng: 74.054312 },
{ lat: 12.9824855, lng: 73.637094},
{ lat: 3.9824855, lng: 72.154312 },
{ lat: 2.8824855, lng: 71.637094},
{ lat: 1.8824855, lng: 70.054312 }
];
</script>
<script src="https://unpkg.com/@google/markerclustererplus@4.0.1/dist/markerclustererplus.min.js">
</script>
<script src="https:maps.googleapis.com/maps/api/js?key=AIzaSyDWu6_Io9xA1oerfOxE77YAv31etN4u3Dw&callback=initMap">
</script>
<script type='text/javascript'></script>
InfoWindow添加到标记的属性，然后调用 InfoWindow 上的.open()本身。我会在此处发布更改，但它的修改足够大，I posted my own answer。new MarkerClusterer()来大幅降低性能？查看 ChirsSwires 的答案。