标记在 Google 地图 API 中不起作用

Question

我是 Google 地图 API 的新手。我编写了一个程序，根据 where.js 中给出的纬度和经度在所有点上放置标记。它加载地图但未放置任何标记。我不明白我做错了什么。

HTML代码如下-

<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Markets of Kolkata</title>
<link href="http://google-developers.appspot.com/maps/documentation/javascript/examples/default.css" rel="stylesheet">

<script src="http://maps.google.cn/maps/api/js" type="text/javascript"></script> -->
<script src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script src="where.js"></script>
  <script>

  function initialize() {
    //alert("To see the title of a marker, hover over the marker but don't click.");
    var myLatlng = new google.maps.LatLng(22.39961,88.101350)
    var mapOptions = {
      zoom: 3,
      center: myLatlng,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    }
    var map = new google.maps.Map(document.getElementById('map_canvas'), mapOptions);

    i = 0;
    var markers = [];
    for ( pos in myData ) {
        i = i + 1;
        var row = myData[pos];
        window.console && console.log(row);
        // if ( i < 3 ) { alert(row); }
        var newLatlng = new google.maps.LatLng(row[0], row[1]);
        var marker = new google.maps.Marker({
            position: newLatlng,
            map: map,
            title: row[3]
        });
        markers.push(marker);
    }
  }
</script>

</head>
<body onload="initialize()">
<div id="map_canvas" style="height: 600px"></div>
<p>
<b>Developed By </b> 
<a href="http://www.linkedin.com/in/arnab-chakravarty-8a329111b?
trk=nav_responsive_tab_profile"><b>Arnab Chakravarty</b></a>.
</p>
</body>
</html>

这是 'where.js'-

的 Javascript 文件

myData = [
[22.5193768,88.3656851, 'K.M.C. Market, 3rd Floor Market Complex, 212, Rash Behari Avenue Road, Hindustan Park, Gariahat, Kolkata, West Bengal 700019, India','COLLEGE STREET MARKET(SPORTS GOOD)'],
[22.4977887,88.3796042, 'Garfa Main Rd, Kolkata, West Bengal 700075, India','COLLEGE STREET MARKET'],
[22.5048463,88.3882325, 'Purbachal Main Rd, Ramlal Bazar, Haltu, Kolkata, West Bengal 700078, India','COLLEGE STREET MARKET'],
[22.5867867,88.3564619, 'Kolkata, West Bengal 700073, India', 'BAITHAK KHANA PAPER MARKET'],
[22.5867867,88.3564619, 'Kolkata, West Bengal 700073, India', 'SAKUNTALA PARK VEGETABLE MARKET'],
[22.5867867,88.3564619, 'Kolkata, West Bengal 700073, India', 'SANTOSHPUR MUNICIPAL MARKET']];

Answer 1

更正此行： // 在 for 循环中添加这一行：
markers.setMap(地图); markers.push（标记）；

还要检查这个 Link：它打不开 http://google-maps-utility-library-v3.googlecode.com/svn/trunk/markerclusterer/src/markerclusterer_compiled.js

检查console.log是否有任何错误：很高兴为您提供帮助

Answer 2

Javascript 数组是零索引的。您的代码引用它们时就好像它们是单索引的。

即你的代码：

i = 0;
var markers = [];
for ( pos in myData ) {
    i = i + 1;
    var row = myData[pos];
    ...
}

您指的是 myData[1]（第 2 项）、myData[2]（第 3 项）等，直至并包括 myData[6]。这将是您的标记数组中的第 7 项，但您只有 6 项。所以你可能遇到了 JS 错误（检查你的控制台），导致标记根本无法加载。

只需将 i = i + 1; 行放在循环的 end 处。或者改变循环样式，例如

for (var pos = 0; pos < myData.length; pos++) {
    var row = myData[pos];
    window.console && console.log(row);
    var newLatlng = new google.maps.LatLng(row[0], row[1]);
    var marker = new google.maps.Marker({
        position: newLatlng,
        map: map,
        title: row[3]
    });
    markers.push(marker);
}

标记在 Google 地图 API 中不起作用

Markers not working in Google Maps API

html

javascript

google-maps

google-maps-api-3

google-maps-markers