Question

JS和一般编程的新手。我想更多地了解GMaps的绘图工具。要了解GMaps，他们自己的示例代码一直是开始研究和实验的最佳点，但是使用绘图工具，它似乎并不是那样。他们developers' site上提供的示例代码运行一个空白页面。这可能是一个愚蠢的问题，答案很明显，但是，我该如何解决这个问题？

<!DOCTYPE html>
<html>
  <head>
    <title>Drawing tools</title>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <link href="/maps/documentation/javascript/examples/default.css" rel="stylesheet">
    <script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false&libraries=drawing"></script>
    <script>
function initialize() {
  var mapOptions = {
    center: new google.maps.LatLng(-34.397, 150.644),
    zoom: 8,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  };

  var map = new google.maps.Map(document.getElementById('map-canvas'),
    mapOptions);

  var drawingManager = new google.maps.drawing.DrawingManager({
    drawingMode: google.maps.drawing.OverlayType.MARKER,
    drawingControl: true,
    drawingControlOptions: {
      position: google.maps.ControlPosition.TOP_CENTER,
      drawingModes: [
        google.maps.drawing.OverlayType.MARKER,
        google.maps.drawing.OverlayType.CIRCLE,
        google.maps.drawing.OverlayType.POLYGON,
        google.maps.drawing.OverlayType.POLYLINE,
        google.maps.drawing.OverlayType.RECTANGLE
      ]
    },
    markerOptions: {
      icon: 'http://labs.google.com/ridefinder/images/mm_20_blue.png'
    },
    circleOptions: {
      fillColor: '#ffff00',
      fillOpacity: 1,
      strokeWeight: 5,
      clickable: false,
      editable: true,
      zIndex: 1
    }
  });
  drawingManager.setMap(map);
}

google.maps.event.addDomListener(window, 'load', initialize);

    </script>
  </head>
  <body>
    <div id="map-canvas"></div>
  </body>
</html>

与原始代码相比，此处仅更改了标记图像的来源。

Answer 1

您需要调整map-canvas元素的大小。将以下内容添加到样式表中。

#map-canvas {display: block; height: 300px; width: 600px;}

并查看是否有诀窍。

谷歌地图v3绘图（谷歌样本不加载地图）

1 个答案: