为什么不在地图上显示功能

Question

这是 fiddle Link。像这样的代码时地图上不显示地图项：

 var featureVectorLayer = new ol.layer.Vector({
    source: featureClusterSource,
    style: new ol.style.Style({
        fill: new ol.style.Fill({
            color: 'rgba(255, 255, 255, 0.2)'
        }),
        stroke: new ol.style.Stroke({
            color: 'blue',
            width: 2
        }),
        image: new ol.style.Circle({
            radius: 7,
            fill: new ol.style.Fill({
                color: '#ffcc33'
            })
        })
    })
});

但我将源 - featureClusterSource 更改为 featureVectorSource.it 效果很好，但这次我在地图上单击要素时没有获得要素。

 var featureVectorLayer = new ol.layer.Vector({
    source: featureVectorSource,
    style: new ol.style.Style({
        fill: new ol.style.Fill({
            color: 'rgba(255, 255, 255, 0.2)'
        }),
        stroke: new ol.style.Stroke({
            color: 'blue',
            width: 2
        }),
        image: new ol.style.Circle({
            radius: 7,
            fill: new ol.style.Fill({
                color: '#ffcc33'
            })
        })
    })
});

如何使用 featureClusterSource 在地图上显示要素？

Answer 1

But i change source - featureClusterSource to featureVectorSource.it works well but in this time i don't get feature when i click feature on map .

单击相交的要素时，更改 forEachFeatureAtPixel 方法以将它们添加到数组中。 Here 可以正常工作 fiddle

    map.on("singleclick", singleClickCB);
    function singleClickCB(event) {
        var features = [];
        map.forEachFeatureAtPixel(event.pixel, function(feature, layer) {
          features.push(feature);
        });
        if (features) {
           var i;
           for (i = 0; i < features.length; ++i) {
              alert(features[i].get('title'));
            }
         }
   } ;

为什么不在地图上显示功能

why doesn't show feature on map

javascript

openlayers-3