javascript - 如何获取给定特征的图层

Question

如何获取给定特征的图层？当用户在 map 上选择某个要素时，我需要访问一些图层属性。在ol2中我使用了feature.layer。

Answer 1

目前，无法从要素走到图层，但您可以创建一个解决方法，例如:

ol.Feature.prototype.getLayer = function() {
    var this_ = this, layer_;
    var sameFeature = function(feature){
        return (this_ === feature) ? true : false;
    };
    map.getLayers().forEach(function(layer){
        var source = layer.getSource();
        if(source instanceof ol.source.Vector){
            var features = source.getFeatures();
            if(features.length > 0){
                var found = features.some(sameFeature);
                if(found){
                    layer_ = layer;
                }
            }
        }
    });

    return layer_;
};

然后使用类似:

var layer = feature.getLayer();