javascript - OpenLayers : how can be ol. FeatureOverlay 在 3.13v 中被替换了吗？

Question

Here有一个叠加功能示例。

它不适用于 3.13 OpenLayers 版本，因为不再支持 ol.FeatureOverlay。

如何替换？你能举个例子吗？

Answer 1

从 changelog/v3.7.0.md 复制粘贴

我们现在使用带有 ol.source.Vector 的 ol.layer.Vector 代替 ol.FeatureOverlay。如果您以前有:

var featureOverlay = new ol.FeatureOverlay({
  map: map,
  style: overlayStyle
});
featureOverlay.addFeature(feature);
featureOverlay.removeFeature(feature);
var collection = featureOverlay.getFeatures();

您必须将其更改为:

var collection = new ol.Collection();
var featureOverlay = new ol.layer.Vector({
  map: map,
  source: new ol.source.Vector({
    features: collection,
    useSpatialIndex: false // optional, might improve performance
  }),
  style: overlayStyle,
  updateWhileAnimating: true, // optional, for instant visual feedback
  updateWhileInteracting: true // optional, for instant visual feedback
});
featureOverlay.getSource().addFeature(feature);
featureOverlay.getSource().removeFeature(feature);