否。
宣传单没有“父组”的概念。一个L.Layer
可以属于零个,一个或多个L.LayerGroup
S,例如: -
var kyiv = [50.5, 30.5],
lnd = [51.51, -0.12],
sf = [37.77, -122.42],
dc = [38.91, -77.04],
trd = [63.41, 10.41],
mad = [40.40, -3.7];
var markerKyiv = L.marker(kyiv).addTo(all),
markerLnd = L.marker(lnd).addTo(all),
markerDC = L.marker(dc).addTo(all),
markerSF = L.marker(sf).addTo(all),
markerTrd = L.marker(trd).addTo(all),
markerMad = L.marker(mad).addTo(all);
var euro = L.featureGroup([markerTrd, markerMad, markerKyiv, markerLnd]).addTo(map);
var usa = L.featureGroup([markerDC, markerSF]).addTo(map);
var northern = L.featureGroup([markerTrd, markerKyiv, markerLnd]).addTo(map);
var southern = L.featureGroup([markerDC, markerSF, markerMad]).addTo(map);
L.control.layers({},{
Euro: euro,
USA: usa,
Northern: northern,
Southern: southern
},{
collapsed:false
}).addTo(map);
看到,作为一个工作示例over here。
尽管您可能想使用hasLayer
method来检查给定图层是否在组中。
如果你不怕单张源代码(并且您已经阅读插件教程和了解了一下内部结构),你也可以猴子补丁此功能,喜欢的东西:
L.LayerGroup.include({
addLayer: function (layer) {
var id = this.getLayerId(layer);
this._layers[id] = layer;
if (this._map) {
this._map.addLayer(layer);
}
// Add this group to the layer's known groups
layer._groups.push(this);
return this;
},
removeLayer: function (layer) {
var id = layer in this._layers ? layer : this.getLayerId(layer);
if (this._map && this._layers[id]) {
this._map.removeLayer(this._layers[id]);
}
delete this._layers[id];
// Remove this group from the layer's known groups
layer._groups.splice(layer._groups.indexOf(this), 1);
return this;
}
});
// Make sure to init a property in L.Layer
L.Layer.addInitHook(function(){
this._groups = [];
});
// Add a public getter for the layer's groups
L.Layer.include({
getGroups: function() {
return this._groups;
}
});
谢谢伊万! – Dixos