美好的一天, 我有两个功能 getGeofences()和getTraces()
getGeofences()将向地图添加多边形,getTraces()将向地图添加标记和折线。
都包含
FGgpx.clearLayers();
它可以很好地清除图层(以及多边形和标记)
我想知道是否有办法只清除多边形或带折线的标记。
例如,当我调用getGeaofences()时,它仅清除仅包含多边形的图层。 当我调用getTraces()时,它只清除标记和折线。
我查看了每个层的功能,但没有成功!
顺便说一下,我怎样才能获得图层的id,我刚刚创建了! 我看看getLayerid和getLayers()但我显然无法正确使用它。帮助也会很有帮助!
以下是一些代码,向您展示我如何构建我的地图。 (我希望我能提供你需要的所有帮助)
var openstreet = osm = L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {attribution: '© <a href="http://osm.org/copyright">OpenStreetMap</a> contributors',maxZoom: 18});
//var map = L.map('mapId',{drawControl: true})
var map = L.map('mapId')
.addLayer(openstreet)
.setView([51.505, -0.09], 8); // London
var FGgpx = new L.FeatureGroup();
map.addLayer(FGgpx);
创建多边形
var options = {
position: 'topleft',
draw: {
polyline: {
shapeOptions: {
color: '#e0222c',
weight: 5
}
},
polygon: {
allowIntersection: false, // Restricts shapes to simple polygons
drawError: {
color: '#61dd28', // Color the shape will turn when intersects
message: '<strong>Oh snap!<strong> you can\'t draw that!' // Message that will show when intersect
},
shapeOptions: {
color: '#c74ed8',
weight: 2//,
}
},
rectangle: false, // Turns off this drawing tool
marker: false,
circle: false
/*
circle: {
drawError: {
color: '#61dd28', // Color the shape will turn when intersects
message: '<strong>Oh snap!<strong> you can\'t draw that!' // Message that will show when intersect
},
shapeOptions: {
color: '#4aaad1',
weight: 2//,
//clickable: true
}
}
*/
},
//edit: false
edit : {
featureGroup: FGgpx, //REQUIRED!!
remove: false,
}
};
var drawControl = new L.Control.Draw(options);
// https://www.npmjs.com/package/leaflet-draw
map.addControl(drawControl);
map.on(L.Draw.Event.CREATED, function (e) {
var type = e.layerType,
layer = e.layer;
var shape = layer.toGeoJSON()
var shape_for_db = JSON.stringify(shape);
// Save into mySQL
saveGeofences(1,shape_for_db);
});
getGeofences()
function getGeofences(devise_id, clearLayer, fitBounds){
$.ajax({
type: "POST",
url: "maps/sql/getGeofences.php",
//data: {data:data},
data: {devise_id:devise_id},
success: result,
error: error,
dataType: "json"
});
function error(data)
{
console.log("Error getGeofences");
console.log(data);
}
function result(data){
if(clearLayer == true){
FGgpx.clearLayers();
}
console.log("getGeofenses");
for (var i = data.features.length - 1; i >= 0; i--) {
var getgeo_geojson = L.geoJson(data.features[i],{onEachFeature: onEachFeature});
}
if(fitBounds == true){
// fit all geofences
}
}
}
getTraces()
function getTrace(hours){
$.ajax({
type: "POST",
url: "maps/sql/getTraces.php",
data:{h:hours}, // Send parameter to get.php
success: result,
error: error,
dataType: "json"
});
function error(data)
{
alert("Error");
console.log("Error");
console.log(data);
}
function result(data){
console.log("getTrace");
nb_trace = 0; // stok le nombre de traces
/*
* Clear maker but does not clear the polyline
*/
FGgpx.clearLayers(); // this clear Polygons and I do not want
// Pass data to geoJson and do somethin on each position
//var mon_geojson = L.geoJson(data,{onEachFeature: onEachFeature});
var mon_geojson = L.geoJson(data,{onEachFeature: onEachFeature});
mon_geojson.addTo(map); // merge to L.featureGroup()
/*
* Add Plyline
*/
// cakk connectTheDots to connext each point a polyline
pathCoords = connectTheDots(mon_geojson);
var polyline = new L.polyline(pathCoords, configPath );
polyline.addTo(map);
getGeofences(1,false,false);
// Fit the map to all marker
//map.fitBounds(FGgpx.getBounds());
console.log("ivalidateSize");
map.invalidateSize();
if(nb_trace == 0)
{
showPopup("No trace for this period",1800);
}
}
};
答案 0 :(得分:0)
您应该创建2个不同的功能组。
var geofences = new L.FeatureGroup();
var traces = new L.FeatureGroup();
map.addLayer(geofences);
map.addLayer(traces);
geofences.clearLayers();
traces.clearLayers();