当控制层发生变化时，绑定弹出窗口被删除

Question

我有一个带有图层控件的地图，该图层控件在baselayer参数中指定了覆盖层：

var overlays = {
'Layer 1': mylayer1,
'Layer 2': mylayer2
};
L.control.layers( overlays, null, { collapsed: false } ).addTo( map );

我指定我的图层如下：

var mylayer1 = L.esri.featureLayer({
url: 'https://.../MapServer/5'
}).on( 'load', function ( e ) {
...
}).on( 'loading', function ( e ) {
...
}).bindPopup( function ( layer ) {
return L.Util.template( '<p>{_score}</p>', layer.feature.properties );
});

问题是，当我更改控件中的层时，不再调用bindPopup事件。

这几乎就像图层z索引没有更新一样。如果能对我如何解决这一问题有任何见解，我将不胜感激。

请参阅：https://codepen.io/jvanulde/pen/LYyOWZo

Answer 1

我发现没有人给出答案。周围有一点，但它有效
您将id: x添加到每一层。在循环的稍后部分，您将检查哪个图层处于活动状态，并检查添加样式display: none的所有其他图层。

window.addEventListener('DOMContentLoaded', () => {
let tiles = L.tileLayer('//{s}.tile.osm.org/{z}/{x}/{y}.png', {
attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors, Points &copy 2012 LINZ'
});
let l1 = L.esri.featureLayer({
url: 'https://maps-cartes.services.geo.ca/server_serveur/rest/services/NRCan/nhsl_en/MapServer/1',
id: 0, // required
simplifyFactor: 0.25,
precision: 5,
fields: ['OBJECTID'],
renderer: L.canvas()
}).bindPopup(function(layer) {
return L.Util.template('<p>Layer 1: <strong>{OBJECTID}</strong></p>', layer.feature.properties);
});
let l2 = L.esri.featureLayer({
url: 'https://maps-cartes.services.geo.ca/server_serveur/rest/services/NRCan/nhsl_en/MapServer/2',
id: 1, // required
simplifyFactor: 0.25,
precision: 5,
fields: ['OBJECTID'],
renderer: L.canvas()
}).bindPopup(function(layer) {
return L.Util.template('<p>Layer 2: <strong>{OBJECTID}</strong></p>', layer.feature.properties);
});
let map = L.map('map', {
center: [49.2827, -123.1207],
zoom: 12,
layers: [tiles]
});
let overlays = {
'Layer 1': l1,
'Layer 2': l2
};
L.control.layers(overlays, null, {
collapsed: false
}).addTo(map);
l1.addTo(map);
map.on('baselayerchange', function(e) {
const layersCanvas = document.querySelectorAll('.leaflet-overlay-pane > canvas');
layersCanvas.forEach((layer, index) => {
layer.style.display = '';
if (index !== e.layer.options.id) {
layer.style.display = 'none';
}
});
});
});

html {
height: 100%;
}
body {
min-height: 100%;
margin: 0;
padding: 0;
}
#map {
width: 100%;
height: 100vh;
}

<link rel="stylesheet" href="https://unpkg.com/leaflet@1.7.1/dist/leaflet.css" />
<script src="https://unpkg.com/leaflet@1.7.1/dist/leaflet.js"></script>
<script src="https://unpkg.com/esri-leaflet@3.0.2/dist/esri-leaflet.js"></script>
<div id="map"></div>