使用弹出窗口在OpenLayers 5上动态显示多个标记

Question

我正在尝试在Map上显示两个标记，这两个标记已保存在数组中。我希望标记是动态显示的，每个标记都有一个弹出窗口。这是我在最后一个问题中编写和编辑的代码。我在地图上什么都没有显示，有人能解决这个问题吗？，我试过很多东西，但似乎都不起作用。我真的是地图的新手。

/* open street map newest version */
var map = new ol.Map({
target: 'map', // the div id
layers: [
new ol.layer.Tile({
source: new ol.source.OSM()
})
],
view: new ol.View({ 
center: ol.proj.fromLonLat([4.35247, 52.520008]),
zoom: 6,
minZoom: 3
})
});
//create an empty vectorSrc
var vectorSource = new ol.source.VectorSource();
var layer = new ol.layer.Vector({
source: vectorSource,
style: new ol.style.Style({
image: new ol.style.Icon({
src: 'https://wiki.openstreetmap.org/w/images/0/0c/Hgv.png', //
scale: 0.4 // set the size of the vehicle on the map
})
})
});
for(var i=0; i < arrayPos.length; i++) {
var long = arrayPos[i][0]
var lat = arrayPos[i][1];
var batteryCharge = arrayPos[i][3];

// create a new feature with the positon values from the array
var feature = new ol.Feature({
geometry: new ol.geom.Point(ol.proj.fromLonLat([long, lat]))
})
//Batterycharge value is going to be printed in the Pop-up window
feature.set('batteryCharge', batteryCharge);
vectorSource.add(feature);
}
map.addLayer(layer);
//initialize the popup
var container = document.getElementById('popup');
var content = document.getElementById('popup-content');
var overlay = new ol.Overlay({
element: container,
autoPan: true,
autoPanAnimation: {
duration: 250
}
});
map.addOverlay(overlay);
//display the pop with on mouse over event
map.on('pointermove', function (event) {
if (map.hasFeatureAtPixel(event.pixel) === true) {  
var coordinate = event.coordinate;
const features = event.target.getFeatures();
const batteryCharge  = features.get(0).get('batteryCharge');
//simple text written in the popup, values are just of the second index
content.innerHTML = event.traget+'<br><b>Batteriestatus: </b>'+batteryCharge;
overlay.setPosition(coordinate);
}
else {
overlay.setPosition(undefined);
}
});

Answer 1

event.target.getFeatures()用于选择交互。对于地图上的pointermove，请尝试替换

if (map.hasFeatureAtPixel(event.pixel) === true) {  
var coordinate = event.coordinate;
const features = event.target.getFeatures();
const batteryCharge  = features.get(0).get('batteryCharge');

带有

const features = map.getFeaturesAtPixel(event.pixel);
if (features.length > 0) {
var coordinate = event.coordinate;
const batteryCharge = features[0].get('batteryCharge');