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javascript - 未捕获的类型错误：无法读取未定义的属性“addLayer”

问题描述

我正在尝试使用传单markercluster。但是当我运行它时，给我一个错误：

Uncaught TypeError: Cannot read property 'addLayer' of undefined

我在functions.js中的代码是：

for (var i in ODO) {
    var latlng = L.latLng({ lat: ODO[i].LastX, lng: ODO[i].LastY });

    L.marker( latlng ).addTo(map);
}
var markerClusters = new L.MarkerClusterGroup().addTo(map);
for ( var i = 0; i < ODO.length ; i++ )
{
    var popup = ODO[i].branchcode +
                '<br/><b>دوره:</b> ' + ODO[i].saleprd +
                '<br/><b>سال :</b> ' + ODO[i].saleyear;

    var map = L.marker( [ODO[i].LastX, ODO[i].LastY] )
                    .bindPopup( popup );

    markerClusters.addLayer( map );
}

map.addLayer( markerClusters );
markerClusterLayer = L.markerClusterGroup({
    disableClusteringAtZoom: 13
}).addTo(map);

调用cdn的顺序是：

<!---leaflet css -->
<link rel="stylesheet" href="css/leaflet.css" integrity="sha512-xodZBNTC5n17Xt2atTPuE1HxjVMSvLVW9ocqUKLsCC5CXdbqCmblAshOMAS6/keqq/sMZMZ19scR4PsZChSR7A=="
crossorigin=""/>
<!---marker cluster css -->
<link rel="stylesheet" href="css/MarkerCluster.css" />
<link rel="stylesheet" href="css/MarkerCluster.Default.css" />
<script src="script/config.js"></script>
<!-- Load Leaflet from CDN -->
<script src="script/leaflet.js" integrity="sha512-XQoYMqMTK8LvdxXYG3nZ448hOEQiglfqkJs1NOQV44cWnUrBc8PkAOcXy20w0vlaXaVUearIOBhiXZ5V3ynxwA=="
crossorigin=""></script>
<script src="script/jquery-3.4.1.min.js"></script>
<!-- marker Cluster CDN -->
<script src="script/leaflet.markercluster.js"></script>
<!-- Load Esri Leaflet from CDN -->
<script src="script/esri-leaflet.js"></script>
<!--- amCharts CDN -->
<script src="script/core.js"></script>
<script src="script/charts.js"></script>
<script src="script/maps.js"></script>
<script src="script/animated.js"></script>

另外，我的 app.js 中有传单层代码，如下所示：

function Init_Map()
{

    map = L.map('map').setView( [36.564012,53.060300], 8);
// add the OpenStreetMap tiles
        L.tileLayer('http://mt0.google.com/vt/lyrs=p&hl=en&x={x}&y={y}&z={z}&s=Ga', {
            maxZoom: 19,
            attribution: '&copy; <a href="https://openstreetmap.org/copyright">OpenStreetMap contributors</a>'
        }).addTo(map);
    }

有谁知道这个错误的原因？

标签： javascriptleafletleaflet.markercluster

解决方案

我Init_Map();在我的标记聚类函数的最后一部分调用了该函数，它就可以工作了

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