AmCharts 4 - 从地图上的点获取数据

Question

我在AmCharts 4地图上开始新项目，我想在点击选定点时获取数据。现在我有点击事件，但我不知道如何从数组中获取数据，例如id和title。

// Create image series
var imageSeries = chart.series.push(new am4maps.MapImageSeries());

// Create a circle image in image series template so it gets replicated to all new images
  var imageSeriesTemplate = imageSeries.mapImages.template;
  var circle = imageSeriesTemplate.createChild(am4core.Circle);

//create circle/points

  circle.radius = 5;
  circle.fill = am4core.color("#000000");
  circle.strokeWidth = 3;
  circle.nonScaling = true;
  circle.tooltipText = "{title}" + "{id}";

  // Set prope fields
  imageSeriesTemplate.propertyFields.latitude = "latitude";
  imageSeriesTemplate.propertyFields.longitude = "longitude";

  // example data cities
  imageSeries.data = [{
    "latitude": 48.856614,
    "longitude": 2.352222,
    "title": "Paris",
    "id": 102
  }, {
    "latitude": 47.856614,
    "longitude": 2.352222,
    "title": "second Paris",
    "id": 104
  }];

    //click on point event
      circle.events.on("hit", function(ev) {

// HERE, WHAT CAN I DO??

        console.log("clicked on ", ev.target);

    }, this);

Answer 1

那将是：

imageSeriesTemplate.events.on("hit", (ev)=>{
  console.log(ev.target.dataItem.dataContext.title)
})