在打开的图层中获取具有特定功能的图层3

Question

How do you get a feature's layer in open layers 3?

Past versions of open layers had a layer property on each feature . This made it easy to apply layer specific styling to features or to organize features by layer.

Open layers 3 is missing this property. I'm using ol.map.forEachFeatureAtPixel to get features on hover.

    // Loop through all features a given pixel
    var feature = map.forEachFeatureAtPixel(pixel, function(feature, layer) {
        console.log(layer);
        return feature;      // just return the first feature
    });

Answer 1

Just wanted to answer my own question in case others are having this issue. OL3 forum disscussion on this.

The solution here to to follow the OL3 hover example and pass in a layer to the ol.map.forEachFeatureAtPixel function. This paramater is not in the documentation so it's hard to find, but it will get you the layer. I'm not sure how this interacts with features on multiple layers.

   // Loop through all features at this pixel but just return the top level feature
    var fl = map.forEachFeatureAtPixel(pixel, function(feature, layer) {
        return {'feature':feature, 'layer':layer};
    });

    var feature = fl.feature,   feature
        layer = fl.layer;