去除小叶层和L.marker方法

Question

我想知道是否有人知道在使用此约定添加它们之后如何或是否可以实际删除一层点:

var pointsLayer, someFeatures = [{
            //Hard coded for now
            "type": "Feature",
            "properties": {
                "name": "Company A",
                "show_on_map": true,
                "icon": 'img/violations.png'
            },
            "geometry": {
                "type": "Point",
                "coordinates": [43.22519, -107.69348]
            }
        }, {
            "type": "Feature",
           .
           .
           .
   }];
for(w=0; w < someFeatures.length; w++){
                pointsLayer = L.marker(someFeatures[w].geometry.coordinates, {icon: violations})   
                    .bindPopup("Company: "+someFeatures[w].properties.name);
                    //add map points 
                    map.addLayer(pointsLayer);
            }

典型的removeLayer(pointsLayer); 在类似的for循环中对我不起作用.但是,这并不意味着没有办法循环.我只是不确定如何.我正在尝试添加有效的点,然后在事件中删除它们(不工作).有任何想法吗？

谢谢大家.

PS如果您认为这个问题相关或有帮助,那么请不要忘了竖起大拇指,欢呼.

Answer 1

您可以在单独的图层(即var markers = new L.FeatureGroup();)上添加标记,然后map.addLayer(markers);在循环外的地图()上添加该图层,而不是直接在地图上添加所有标记.

例如,

http://jsfiddle.net/9BXL7/

HTML

<button>remove all markers</button>
<div id="map"></div>

CSS

html, body, #map {
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
}

JS

var cloudmade = L.tileLayer('http://{s}.tile.cloudmade.com/{key}/997/256/{z}/{x}/{y}.png', {
    maxZoom: 18,
    attribution: 'Map data © 2011 OpenStreetMap contributors, Imagery © 2011 CloudMade',
    key: 'BC9A493B41014CAABB98F0471D759707'
});

var map = L.map('map')
    .setView([50.5, 30.51], 15)
    .addLayer(cloudmade);

var markers = new L.FeatureGroup();

function getRandomLatLng(map) {
    var bounds = map.getBounds(),
        southWest = bounds.getSouthWest(),
        northEast = bounds.getNorthEast(),
        lngSpan = northEast.lng - southWest.lng,
        latSpan = northEast.lat - southWest.lat;

    return new L.LatLng(
    southWest.lat + latSpan * Math.random(),
    southWest.lng + lngSpan * Math.random());
}

function populate() {
    for (var i = 0; i < 10; i++) {
        var marker = L.marker(getRandomLatLng(map));
        marker.bindPopup("<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec odio. Quisque volutpat mattis eros. Nullam malesuada erat ut turpis. Suspendisse urna nibh, viverra non, semper suscipit, posuere a, pede.</p><p>Donec nec justo eget felis facilisis fermentum. Aliquam porttitor mauris sit amet orci. Aenean dignissim pellentesque.</p>", {
            showOnMouseOver: true
        });
        markers.addLayer(marker);
    }
    return false;
}

map.addLayer(markers);

populate();
function removeAllMarkers(){
    map.removeLayer(markers);
}
document.querySelector('button').onclick=function(){removeAllMarkers()};

您是否需要删除或清除标记图层以替换将来使用的点:

markers.clearLayers();

Answer 2

用途map.removeLayer():

var circle = L.circle([lat, lng], 1000).addTo(map);
map.removeLayer(circle);