我如何解决此 MarkerCluster 签入/签出错误（传单销售人员）？

Question

问题是，当我在叠加层上签出并再次签入后，我收到此错误：

Uncaught TypeError: Cannot read property 'x' of undefined throws at dist/leaflet.markercluster.js:1:25696 TypeError: Cannot read property 'x' of undefined at L.DistanceGrid._sqDist (DistanceGrid.js:114)
at L.DistanceGrid.getNearObject (DistanceGrid.js:94) at e._addLayer (MarkerClusterGroup.js:974) at eval (MarkerClusterGroup.js:249)
at e.addLayers (MarkerClusterGroup.js:283) at e.addLayers (layersupport.js:99) at e.onAdd (layersupport.js:517) at e._layerAdd (leaflet.js:5) at e.whenReady (leaflet.js:5) at e.addLayer (leaflet.js:5)

I saw that this function from DistanceGrid(is in leaflet library) which is called when i check in on the overlay 

_sqDist: function (p, p2) {
      var dx = p2.x - p.x,
          dy = p2.y - p.y;
      return dx * dx + dy * dy;
  }

当我签入时，p 不知何故未定义。我已经为这个错误苦苦挣扎了很长时间。也许你有什么建议

为组定义了标记并且它们已正确显示问题仅与签入签出有关。一旦我检查出它们，集群就会消失，一旦我签入，我就会收到之前提到的错误，而不是在地图上显示集群

控制器代码如下：

JS controller: 
var map = L.map('map', {zoomControl: true, tap: false, preferCanvas:true})
var group1,group2,group3,group4;
var myRenderer = L.canvas({ padding: 0.5 });
 var markers = L.markerClusterGroup.layerSupport( { 
        chunkedLoading: true,
        renderer: myRenderer,
        iconCreateFunction: function  (cluster) {
        var childCount = cluster.getChildCount();

        var c = ' marker-cluster-';
        if (childCount < 10) {
            c += 'small';
        } 
        else if (childCount < 100) {
            c += 'medium';
        } 
        else {
                c += 'large';
        }

        return new L.DivIcon({ html: '<div><span>' + childCount + '</span> 
</div>', 
                              className: 'marker-cluster' + c, iconSize: 
 new L.Point(40, 40) });
            }
});

 group1 = L.layerGroup(),
       group2 = L.layerGroup(),
      group3 = L.layerGroup(),
       group4 = L.layerGroup(),

    markers.checkIn([group1, group2, group3, group4]);

    var overlayMaps = {
        "g1": group1,
        "g2": group2,
        "g3":group3,
        "g4":group4
    };
    var control = L.control.layers(null, overlayMaps, { collapsed: true });


    control.addTo(map);

    group1.addTo(map); // Adding to map or to AutoMCG are now equivalent.
    group2.addTo(map);
    group3.addTo(map);
    group4.addTo(map);

 markers.addTo(map);

PS：我不知道如何提供一个可行的版本，因为这是一个 salesforce 应用程序

Answer 1

可能 chunkedLoading 选项没有被 Leaflet.markercluster.layerSupport 插件很好地处理。

我不确定您为什么需要定期 "checkout" 和 "checkin"？您是指使用图层控件删除/添加叠加层吗？

否则，如果您 "only" 需要一个解决方案来使用 Leaflet.markercluster 和图层控件，您可以尝试使用更简单的插件 Leaflet.FeatureGroup.SubGroup，尽管如果 chunkedLoading 是问题的原因，它可能与该插件相同。

Answer 2

我通过将所有顶点加在一起解决了这个问题，我创建了一个包含所有顶点的数组，然后使用函数 addLayers

添加它们

  const folders = 800;
  for (let index = 0; index < folders; index++) {
    const folder = this.createFolder();
    this.folders.push(folder);
  }
  this.clustersFeature.addLayers(this.folders);

我如何解决此 MarkerCluster 签入/签出错误（传单销售人员）？

How can i resolve this MarkerCluster checkin/ checkout error (leaflet salesforce)?

javascript

leaflet

salesforce

salesforce-lightning

leaflet.markercluster