Question

我有一组标记对象markers。然后我使用for循环向它们添加事件侦听器。但是，我似乎无法弄清楚如何确定点击标记的位置。

以下是我现在的代码：

 for(var i = 0; i < this.markers.length; i++) //adds listener to all markers
 {
      google.maps.event.addListener(this.markers[i], "click", () =>
      {
            //need to get access to which marker was clicked
      }); 
 }

我已尝试将参数传递给箭头函数，但似乎没有任何效果。有任何想法吗？只要函数可以返回正确标记的索引，就不需要箭头函数。

Answer 1

请阅读文档：https://developers.google.com/maps/documentation/javascript/events#EventClosures

这是一个有效的例子：

function initialize() {

  var mapOptions = {
    zoom: 5,
    mapTypeId: google.maps.MapTypeId.ROADMAP,
    center: new google.maps.LatLng(1, 1)
  };

  var locations = [
    [new google.maps.LatLng(0, 0), 'Marker 1', 'Infowindow content for Marker 1'],
    [new google.maps.LatLng(0, 1), 'Marker 2', 'Infowindow content for Marker 2'],
    [new google.maps.LatLng(0, 2), 'Marker 3', 'Infowindow content for Marker 3'],
    [new google.maps.LatLng(1, 0), 'Marker 4', 'Infowindow content for Marker 4'],
    [new google.maps.LatLng(1, 1), 'Marker 5', 'Infowindow content for Marker 5'],
    [new google.maps.LatLng(1, 2), 'Marker 6', 'Infowindow content for Marker 6']
  ];

  var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);

  var infowindow = new google.maps.InfoWindow();

  for (var i = 0; i < locations.length; i++) {

    var marker = new google.maps.Marker({
      position: locations[i][0],
      map: map,
      title: locations[i][1]
    });

    google.maps.event.addListener(marker, 'click', (function(marker, i) {

      return function() {
        infowindow.setContent(locations[i][2]);
        infowindow.open(map, marker);
      }

    })(marker, i));
  }
}

initialize();

#map-canvas {
  height: 200px;
}

<div id="map-canvas"></div>

<script src="https://maps.googleapis.com/maps/api/js"></script>

如何找出从谷歌地图标记数组中点击的标记

1 个答案: