在Google Maps API中更改颜色多个标记

Question

我想问一下如何在谷歌地图中更改标记的颜色。条件是，我有一个程序在谷歌地图中创建多个标记。但是我如何为每个标记指定颜色？

这是我现在的代码，

＆＃13;

＆＃13;

SELECT Count(*) AS aggregate FROM (
  SELECT id FROM posts
  WHERE group_id BETWEEN 1 AND 10 AND group_id != 8
    UNION ALL
  SELECT id FROM posts
  WHERE group_id BETWEEN 20 AND 39
    UNION ALL
  SELECT id FROM posts
  WHERE group_id BETWEEN 44 AND 50 AND group_id != 48
    UNION ALL
  SELECT id FROM posts
  WHERE group_id BETWEEN 53 AND 59
    UNION ALL
  SELECT id FROM posts
  WHERE group_id BETWEEN 64 AND 69
    UNION ALL
  SELECT id FROM posts
  WHERE group_id = 16) ids 
JOIN post_stats ON ids.id = post_stats.post_id

＆＃13;

＆＃13;

＆＃13;

Answer 1

一种方法是将颜色传递给addMarker函数：

function addMarker(location, color) {
  var marker = new google.maps.Marker({
    position: location,
    label: labels[labelIndex++ % labels.length],
    icon: 'http://maps.google.com/mapfiles/ms/icons/'+color+'.png',
    map: map
  });
  markers.push(marker);
}

proof of concept fiddle

代码段

var markers = [];
var map;
var labels = 'ABCD';
var labelIndex = 0;

function initialize() {
  map = new google.maps.Map(
    document.getElementById("map_canvas"), {
      center: new google.maps.LatLng(40.7127837, -74.0059413),
      zoom: 11,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    });
  // New York, NY, USA (40.7127837, -74.0059413)
  // Newark, NJ, USA (40.735657, -74.1723667)
  // Jersey City, NJ, USA (40.72815749999999, -74.07764170000002)
  // Bayonne, NJ, USA (40.6687141, -74.11430910000001)

  addMarker({
    lat: 40.7127837,
    lng: -74.0059413
  }, "red");
  addMarker({
    lat: 40.735657,
    lng: -74.1723667
  }, "green");
  addMarker({
    lat: 40.7281575,
    lng: -74.0776417
  }, "yellow");
  addMarker({
    lat: 40.6687141,
    lng: -74.1143091
  }, "orange");
}
google.maps.event.addDomListener(window, "load", initialize);


function addMarker(location, color) {
  var marker = new google.maps.Marker({
    position: location,
    label: labels[labelIndex++ % labels.length],
    icon: {
      url: 'http://maps.google.com/mapfiles/ms/icons/' + color + '.png',
      labelOrigin: new google.maps.Point(15, 10)
    },
    map: map
  });
  markers.push(marker);
}

html,
body,
#map_canvas {
  height: 100%;
  width: 100%;
  margin: 0px;
  padding: 0px
}

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