Question

我尝试实例化google.maps.Icon，

var icon = new google.maps.Icon({
    anchor:new google.maps.Point(0,0),
    origin:new google.maps.Point(0,0),
    scaledSize: new google.maps.Size(10,10),
    size: new google.maps.Size(10,10),
    url:"http://maps.google.com/mapfiles/kml/paddle/purple-square.png"
});

但是我收到了错误，

Uncaught TypeError: undefined is not a function

Answer 1

我无法使其发挥作用：What is the construct interface `google.maps.Icon`（Example）

对我而言，它适用于匿名对象：

    var image = {url: 'https://developers.google.com/maps/documentation/javascript/examples/images/beachflag.png',
        size: new google.maps.Size(20, 32),
        origin: new google.maps.Point(0,0),
        anchor: new google.maps.Point(0, 32)};

      var marker = new google.maps.Marker({
          position: myLatLng,
          map: map,
          icon: image,
      });

Example from the documentation

Example with your icon

代码段

function initialize() {
  var mapOptions = {
    zoom: 10,
    center: new google.maps.LatLng(-33.9, 151.2),
    mapTypeId: google.maps.MapTypeId.ROADMAP
  }
  var map = new google.maps.Map(document.getElementById('map_canvas'),
    mapOptions);

  setMarkers(map, beaches);
}

/**
 * Data for the markers consisting of a name, a LatLng and a zIndex for
 * the order in which these markers should display on top of each
 * other.
 */
var beaches = [
  ['Bondi Beach', -33.890542, 151.274856, 4],
  ['Coogee Beach', -33.923036, 151.259052, 5],
  ['Cronulla Beach', -34.028249, 151.157507, 3],
  ['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
  ['Maroubra Beach', -33.950198, 151.259302, 1]
];

function setMarkers(map, locations) {
  // Add markers to the map

  // Marker sizes are expressed as a Size of X,Y
  // where the origin of the image (0,0) is located
  // in the top left of the image.

  // Origins, anchor positions and coordinates of the marker
  // increase in the X direction to the right and in
  // the Y direction down.
  var image = {
    anchor: new google.maps.Point(16, 32),
    origin: new google.maps.Point(0, 0),
    scaledSize: new google.maps.Size(32, 32),
    size: new google.maps.Size(64, 64),
    url: "http://maps.google.com/mapfiles/kml/paddle/purple-square.png"
  };

  for (var i = 0; i < locations.length; i++) {
    var beach = locations[i];
    var myLatLng = new google.maps.LatLng(beach[1], beach[2]);
    var marker = new google.maps.Marker({
      position: myLatLng,
      map: map,
      icon: image,
      title: beach[0],
      zIndex: Math.round(myLatLng.lat() * -100000) << 5
    });
  }
}

google.maps.event.addDomListener(window, 'load', initialize);

html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}
#map_canvas {
  height: 100%;
}
@media print {
  html,
  body {
    height: auto;
  }
  #map_canvas {
    height: 650px;
  }
}

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

Answer 2

google.maps.Icon是一个Javascript对象文字，而不是一个类。直到5分钟前，当我试图解决同样的问题时，我才知道这一点。

google maps API文档：

https://developers.google.com/maps/documentation/javascript/overlays#ComplexIcons

举例说明从已弃用的MarkerImage（v3.9）转换为Icon（v3.10 +）

var image = new google.maps.MarkerImage(
    place.icon,
    new google.maps.Size(71, 71),
    new google.maps.Point(0, 0),
    new google.maps.Point(17, 34),
    new google.maps.Size(25, 25));

变为

var image = {
    url: place.icon,
    size: new google.maps.Size(71, 71),
    origin: new google.maps.Point(0, 0),
    anchor: new google.maps.Point(17, 34),
    scaledSize: new google.maps.Size(25, 25)
};

所以艾伦（和我）试图使用一个不存在的构造函数new google.maps.Icon()。只需删除留下var icon = {<list of properties>};的文字，一切都应该有用。

google API ref：

https://developers.google.com/maps/documentation/javascript/reference#Icon

并没有使这一点非常明显。

我也去教育自己关于对象文字 - 你可以在mozilla找到解释 - 搜索javascript对象文字 - 我无法发布链接，因为这是我在堆栈交换时给出的第一个答案，我需要更多指向添加两个以上的链接！

无法实例化google.maps.Icon

2 个答案: