小编Beh*_*ted的帖子

我想从数据库中检索多边形数据，然后对其进行编辑。我可以检索多边形（存储为 geojson），但不能使它们可编辑。我怎样才能做到这一点？

    var drawnItems = new L.FeatureGroup();
    map.addLayer(drawnItems);

    var drawControl = new L.Control.Draw({
        edit: {
            featureGroup: drawnItems
        }
    });
    map.addControl(drawControl);

    map.on('draw:created',function(e) {
    e.layer.addTo(drawnItems);
    });

    L.control.layers(baseLayers).addTo(map);    

    var oldPolygon = null;
    function showOnMap(rowid){
    if(oldPolygon != null){
    map.removeLayer(oldPolygon);
    }

    $.get("testdbextract.php?show="+rowid,function(data){
        var newPolygon = L.geoJson(data);
        newPolygon.addTo(drawnItems); // or drawnItems.addLayer(newPolygon);
        oldPolygon = newPolygon;
        }); 
    }