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我正在处理一个项目，尝试使用 JavaScript API 将要素图层从 ArcGIS Online 添加到 Web 地图应用程序，用户可以通过 HTML 复选框打开和关闭图层。图层正在正确导入，并在绕过复选框时显示，但我可以让它与复选框一起使用。我已经从 ArcGIS 示例等中破解了代码，所以它一定是我一直错过的一些小东西！

这是代码-基本上我想要的只是根据用户打开和关闭的复选框在恒定基本地图上打开和关闭的图层

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <!--The viewport meta tag is used to improve the presentation and behavior of the samples
      on iOS devices-->
    <meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
    <title>Select with feature layer</title>
    <link rel="stylesheet" href="http://js.arcgis.com/3.10/js/dojo/dijit/themes/tundra/tundra.css">
    <link rel="stylesheet" href="http://js.arcgis.com/3.10/js/esri/css/esri.css">
    <style>
      html, body, #mapDiv {
        padding: 0;
        margin: 0;
        height: 100%;
      }
      #messages{
        background-color: #fff;
        box-shadow: 0 0 5px #888;
        font-size: 1.1em;
        max-width: 15em;
        padding: 0.5em;
        position: absolute;
        right: 20px;
        top: 20px;
        z-index: 40;
      }
    </style>
    <script src="http://js.arcgis.com/3.10/"></script>
    <script>

        var map;
        require([
        "esri/map", "esri/layers/FeatureLayer",
        "esri/tasks/query", "esri/geometry/Circle",
        "esri/graphic", "esri/InfoTemplate", "esri/symbols/SimpleMarkerSymbol",
        "esri/symbols/SimpleLineSymbol", "esri/symbols/SimpleFillSymbol", "esri/renderers/SimpleRenderer",
        "esri/config", "esri/Color", "dojo/dom", "dojo/domReady!", "dojo/on", "dojo/query", "dojo/domReady!", "esri/layers/ArcGISDynamicMapServiceLayer", "esri/layers/ImageParameters",
      ], function (
        Map, FeatureLayer,
        Query, Circle,
        Graphic, InfoTemplate, SimpleMarkerSymbol,
        SimpleLineSymbol, SimpleFillSymbol, SimpleRenderer,
        esriConfig, Color, dom, on, query, ArcGISDynamicMapServiceLayer, ImageParameters
      ) {
          // use a proxy page if a URL generated by this page is greater than 2000 characters
          //
          // this should not be needed as nearly all query & select functions are performed on the client
          esriConfig.defaults.io.proxyUrl = "/proxy";

          map = new Map("mapDiv", {
              basemap: "streets",
              center: [-120.303130, 36.542750],
              zoom: 5,
              slider: false
          });

          //add the census block points in on demand mode. Note that an info template has been defined so when
          //selected features are clicked a popup window will appear displaying the content defined in the info template.
          var Offices = new FeatureLayer("URL", {
              infoTemplate: new InfoTemplate("Block: ${BLOCK}", "${*}"),
              outFields: ["*"]
          });

          var Northridge = new FeatureLayer("URL", {
              infoTemplate: new InfoTemplate("Block: ${BLOCK}", "${*}"),
              outFields: ["*"]
          });

          var Associates = new FeatureLayer("URL", {
              infoTemplate: new InfoTemplate("Block: ${BLOCK}", "${*}"),
              outFields: ["*"]
          });

          // selection symbol used to draw the selected census block points within the buffer polygon
          var symbol = new SimpleMarkerSymbol(
          SimpleMarkerSymbol.STYLE_CIRCLE,
          12,
          new SimpleLineSymbol(
            SimpleLineSymbol.STYLE_NULL,
            new Color([247, 34, 101, 0.9]),
            1
          ),
          new Color([207, 34, 171, 0.5])
        );
          Offices.setSelectionSymbol(symbol);

          //make unselected features invisible
          var nullSymbol = new SimpleMarkerSymbol().setSize(10);
          var RedCircle = new SimpleMarkerSymbol().setSize(8);

          Offices.setRenderer(new SimpleRenderer(nullSymbol));

          on(dom.byId("layer0CheckBox"), "change", updateLayerVisibility);
          on(dom.byId("layer1CheckBox"), "change", updateLayerVisibility);
          on(dom.byId("layer2CheckBox"), "change", updateLayerVisibility);

          function updateLayerVisibility() {
              var inputs = query(".list_item");
              var inputCount = inputs.length;
              //in this application layer 2 is always on.
              visibleLayerIds = [2];

              for (var i = 0; i < inputCount; i++) {
                  if (inputs[i].checked) {
                      visibleLayerIds.push(inputs[i].value);
                  }
              }

              if (visibleLayerIds.length === 0) {
                  visibleLayerIds.push(-1);
              }

              map.addLayers(visibleLayerIds);
          }
      });

    </script>
  </head>

  <body>
<br />
    <br />
        Layer List : <span id="layer_list"><input type='checkbox' class='list_item' id='layer0CheckBox' value="Northridge" />Earthquake  
          <input type='checkbox' class='list_item' id='layer1CheckBox' value="Offices" />Offices
          <input type='checkbox' class='list_item' id='layer2CheckBox' value="Associates" />Associates
        </span><br />
        <br />


    <div id="mapDiv"></div>

  </body>
</html>
4

2 回答 2

1

很久以前做的

 changeVLayerVisibility: function(names) {
    Ext.Array.each(map.graphicsLayerIds, function(id) {
        map.getLayer(id).setVisibility(names.indexOf(id) !== -1);
    });
},

在此处查看示例：http ://smart-tech-group.com/arcgismap/ 与地图相关的逻辑存储在http://smart-tech-group.com/arcgismap/APP/view/ArcMapViewer.js我是当时是一个 js 新手，所以请随意争论我的代码风格；）

于 2014-10-01T08:15:40.273 回答
0

  1. 在函数 updateLayerVisibility 中，map.addLayers 的使用是错误的。您应该添加要素图层、图形图层、动态图层或平铺图层，而不是 id，除非您将它们存储在数组 visibleLayerIds 中。

  2. 您可以考虑使用 ArcGISDynamicMapServiceLayer 来控制可见图层 ID。然后使用 setVisibleLayers API 见https://developers.arcgis.com/javascript/jsapi/arcgisdynamicmapservicelayer-amd.html

  3. FeatureLayer 通常用于单层，使用 MapServer/2 或 FeatureServer/2 等服务。

于 2016-03-30T05:12:24.220 回答