Question

我创建了一个Google地图表单，允许用户在文本字段中输入地址并对该条目进行地理编码。然后将标记放在地图上。这工作正常，但我想添加一个额外的addListener，所以当用户点击地图时，它会在他们点击的位置添加另一个引脚。出于某种原因，我的'click'addListener无效。我怎么会有多个像这样添加听众呢？

我附上了我的代码：

  function initialize() {
    var mapOptions = {
      center: new google.maps.LatLng(40.7,-74.0),
      zoom: 13,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    };
    var map = new google.maps.Map(document.getElementById('map_canvas'),
      mapOptions);

    var input = document.getElementById('searchTextField');
    var autocomplete = new google.maps.places.Autocomplete(input);

    autocomplete.bindTo('bounds', map);

    var marker = new google.maps.Marker({
      map: map,
      draggable: true
    });

    google.maps.event.addListener(autocomplete, 'place_changed', function() {
      var place = autocomplete.getPlace();
      if (place.geometry.viewport) {
        map.fitBounds(place.geometry.viewport);
      } else {
        map.setCenter(place.geometry.location);
        map.setZoom(16);
      }

      var image = "http://www.google.com/mapfiles/marker_green.png";
      marker.setIcon(image);
      marker.setPosition(place.geometry.location);



      var address = '';
      if (place.address_components) {
        address = [(place.address_components[0] &&
                    place.address_components[0].short_name || ''),
                   (place.address_components[1] &&
                    place.address_components[1].short_name || ''),
                   (place.address_components[2] &&
                    place.address_components[2].short_name || '')
                  ].join(' ');
      }
    });
  }
  google.maps.event.addDomListener(window, 'load', initialize);

google.maps.event.addListener(map, 'click', function() {
    //alert("Hello! I am an alert box!!");

    var marker1 = new google.maps.Marker({
      map: map,
      draggable: true
    });
    var image = "http://www.google.com/mapfiles/marker_green.png";
      marker1.setIcon(image);
      marker1.setPosition(new google.maps.LatLng(40.7,-74.0));
    map.addOverlay(marker1);
});

谢谢

Answer 1

您可以使用

google.maps.event.addListener(map,'click', function()...

将onclick事件添加到地图对象。这是一个参考： http://code.google.com/apis/maps/documentation/javascript/reference.html#Map

您还可以使用Google地图绘图工具库： http://code.google.com/apis/maps/documentation/javascript/overlays.html#drawing_tools

Answer 2

地图点击事件将返回鼠标点击的位置。

更新：要在添加新标记时删除旧标记，您需要将标记的实例存储在侦听器范围之外，然后可以在侦听器事件开始时将其删除。

var singleMarker;

google.maps.event.addListener(map, 'click', function(event) {

    //if marker exists, erase marker
    if(singleMarker){
        singleMarker.setMap(null);
    }

    singleMarker = new google.maps.Marker({
        position: event.latLng, //mouse click position
        map: map,
        draggable: true,
        icon: "http://www.google.com/mapfiles/marker_green.png"
    });
});

更新了fiddle example.

使用地理编码将多个addListener事件添加到Google地图表单

2 个答案: