Google maps api 3 谷歌地图API集群标记问题

我在创建聚集标记时遇到问题。到目前为止，我只能看到标记本身。我尝试在for循环之前创建marker cluster，但这并不能解决问题

function codeAddress() {
          var markers = [];
          var address = ['Reston, VA']
          address.push('Herndon, VA');
          address.push('San Francisco, CA')
          address.push('San Jose, CA')
          for(i = 0; i < address.length; i++){
            geocoder.geocode( { 'address': address[i]}, function(results, status) {
            if (status == 'OK') {
              var marker = new google.maps.Marker({
                  map: map,
                  position: results[0].geometry.location,
                  icon: image
              });
            } else{
              alert('Geocoding did not work' + status);
            }
            markers.push(marker);
          });
        }
        const imagePath = "m1.png";
        const markerClusterer = new MarkerClusterer(map, markers, {imagePath: imagePath},{
          maxZoom: 5
        });
        markerClusterer.addMarker(marker);
      }

函数代码地址（）{
var标记=[]；
变量地址=['Reston，VA']
地址：push（'Herndon，VA'）；
地址：推送（'加利福尼亚州旧金山'）
地址：push（加利福尼亚州圣何塞市）
对于（i=0；i

---

地理编码器是异步的。将标记数组添加到markerClusterer时，该数组为空

在循环之前创建MarkerClusterer，然后移动

MarkerClusterer.addMarker（marker）在geocoder回调例程中

function codeAddress() {
  var markers = [];
  var address = ['Reston, VA']
  address.push('Herndon, VA');
  address.push('San Francisco, CA')
  address.push('San Jose, CA')
  const markerClusterer = new MarkerClusterer(map, [], {
    imagePath: 'https://developers.google.com/maps/documentation/javascript/examples/markerclusterer/m',
    maxZoom: 5
  });
  for (i = 0; i < address.length; i++) {
    geocoder.geocode({
      'address': address[i]
    }, function(results, status) {
      if (status == 'OK') {
        var marker = new google.maps.Marker({
          map: map,
          position: results[0].geometry.location
        });
        markers.push(marker);
        markerClusterer.addMarker(marker);
      } else {
        alert('Geocoding did not work' + status);
      }
    });
  }
}

你能描述一下你想看到什么吗？