Dynamically change the color of a polygon in leafl

问题:

For anyone who is familiar with Leaflet, do you know a way to dynamically change a polygon's color? For example, take a circle defined like this:

window.circle = L.circle([51.508, -0.11], 500, {
color: 'red',
fillColor: '#ffffff',
    fillOpacity: 0.5
}).addTo(map);

Then later, after a user clicks a button somewhere on an interface (for example), I want to change the color of the circle like this:

window.circle.options.fillColor = "#dddddd";

The code changes the value for window.circle.options.fillColor, but the change is not reflected by a change to the color of the polygon on the map. I've searched around but haven't found anything. Any ideas?

Thanks.

回答1:

L.Circle extends L.Path (http://leafletjs.com/reference.html#path), that have method setStyle( <Path options> object ), and you can apply new style as window.circle.setStyle({fillColor: '#dddddd'});

回答2:

If you are looking for something like this:

const circle = L.circle([lat, lng], {
   style: style,
   onEachFeature: onEachFeature,
});

These options are available for geoJson data ie: L.geojson()..... :D

So, for polygon . Try,

circle.setStyle({
    color: 'red'
});

回答3:

I have a set of polygons in my map, this code can change the fillcolor of each polygon dynamically :

// 'file' is a geojson layer
L.geoJSON(file, {
onEachFeature: colorlayer,
style: {
    color: "#00008c",
    opacity: 0.6,
    fillColor: '#333333',
    fillOpacity: 0
}
}).addTo(map);
function colorlayer(feature, layer) {
layer.on('mouseover', function (e) {
    layer.setStyle({
        fillOpacity: 0.4
    });
});
layer.on('mouseout', function (e) {
    layer.setStyle({
        fillOpacity: 0
    });
});

}