Getting the count of markers in a layer in leaflet

问题:

I have a Leaflet map with a layer called flickrpics that is loaded dynamically in geojson based on the bbox of the current map view. I would like to get a simple count of the number of markers in that layer, so that I can display it next to the layer label in the layer control. I've tried things like flickrpics.length but it's saying undefined.

Apologies, pretty new to Leaflet and javascript!

回答1:

Reference: https://leafletjs.com/reference-1.3.4.html#geojson

Methods inherited from LayerGroup:

getLayers() Layer[]

Returns an array of all the layers added to the group.

var pins = L.geoJson(geojsonFeature, {}).addTo(map); var totalPins = pins.getLayers().length;

回答2:

If you are using L.geoJson for geoJSON loading, you can use the onEachFeature to count the number of objects in the geoJSON layer. Something like:

var counter = 0;

function onEachFeature(feature, layer) {
counter++;
}

L.geoJson(geojsonFeature, {
onEachFeature: onEachFeature
}).addTo(map);

See http://leafletjs.com/examples/geojson.html for more information.