OpenLayers 3绘制交互onFeature添加事件

Question

在OL2中，我能够做到以下几点：

var drawControl = new ol.Control.DrawFeature(
    myLayer,
    ol.Handler.RegularPolygon, {
        handlerOptions: {
            sides: 4,
            irregular: true
        },
        eventListeners: {
            featureadded: function( e ) {
                // process features
            }
        }
    }
);

有没有办法在OL3中添加功能？我想要做的是在绘制后绘制特征。理想情况下，如果可能的话，我会在绘制之前对它们进行投影。

Answer 1

// draw is an instance of ol.interaction.Draw
// when draw ended but the feature was not added yet to ol.source.Vector
draw.on('drawend', function(evt){
  console.info(evt.feature);
});

// vectorSource is an instance of ol.source.Vector
// added to source
vectorSource.on('addfeature', function(evt) {
    console.info(evt.feature);
});