ArcGIS Javascript API-addLayers

Question

我正在一個項目中嘗試使用JavaScript API將ArcGIS Online中的要素圖層添加到Web地圖應用程序中，用戶可以通過HTML復選框在圖層之間進行切換。 圖層正確導入並在繞過復選框后顯示出來，但我可以將其與復選框一起使用。 我已經從ArcGIS示例中竊取了代碼，因此這一定是我一直缺少的小東西！

這是代碼-基本上我想要的只是基於用戶在哪個復選框上打勾和打勾而在一個恆定的基本地圖上切換圖層的功能。

<!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>

Answer 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);
    });
},

在此處查看示例： http : //smart-tech-group.com/arcgismap/與地圖相關的邏輯存儲在http://smart-tech-group.com/arcgismap/APP/view/ArcMapViewer.js中那時是js新手，請隨時討論我的代碼風格；）

Answer 2

在updateLayerVisibility函數中，map.addLayers用法錯誤。 您應該添加要素圖層，圖形圖層，動態圖層或平鋪圖層，而不是ID，除非您將其存儲在數組visibleLayerIds中。
您可以考慮使用ArcGISDynamicMapServiceLayer來控制可見的圖層ID。 然后使用setVisibleLayers API參見https://developers.arcgis.com/javascript/jsapi/arcgisdynamicmapservicelayer-amd.html
FeatureLayer通常用於單個圖層，使用諸如MapServer / 2或FeatureServer / 2之類的服務。

ArcGIS Javascript API-addLayers

問題描述

2 個解決方案

解決方案1
0 2014-10-01 08:15:40

解決方案2
0 2016-03-30 05:12:24

ArcGIS Javascript API-addLayers

問題描述

2 個解決方案

解決方案1 0 2014-10-01 08:15:40

解決方案2 0 2016-03-30 05:12:24

解決方案1
0 2014-10-01 08:15:40

解決方案2
0 2016-03-30 05:12:24