编写代码：arcgis api for js中sketch多选形状

以下是 ArcGIS API for JavaScript 中使用 Sketch 多选形状的示例代码：

require([
  "esri/views/MapView",
  "esri/WebMap",
  "esri/widgets/Sketch",
  "esri/layers/GraphicsLayer",
  "esri/Graphic",
  "dojo/domReady!"
], function(MapView, WebMap, Sketch, GraphicsLayer, Graphic) {

  // Create a WebMap instance and set the map id to "map"
  var webmap = new WebMap({
    portalItem: {
      id: "your-webmap-id-here"
    }
  });

  // Create a MapView instance for the "map" div
  var view = new MapView({
    container: "map",
    map: webmap
  });
  
  // Create a GraphicsLayer for the sketch and add it to the map
  var sketchLayer = new GraphicsLayer();
  view.map.add(sketchLayer);

  // Create a new Sketch widget and add it to the view
  var sketch = new Sketch({
    layer: sketchLayer,
    view: view,
    creationMode: "update"
  });
  view.ui.add(sketch, "top-right");

  // Listen for the "create" event on the Sketch widget
  sketch.on("create", function(event) {
    if (event.state === "complete") {
      var graphics = event.graphic;
      if (graphics.geometry.type === "polygon") {
        // If a polygon was created, select all graphics within the polygon
        var selectedGraphics = sketchLayer.graphics.filter(function(graphic) {
          return graphics.geometry.contains(graphic.geometry);
        });
        view.graphics.removeAll();
        selectedGraphics.forEach(function(graphic) {
          graphic.symbol.color = "red";
          view.graphics.add(graphic);
        });
      }
    }
  });

});

该代码使用 ArcGIS API for JavaScript 创建了一个包含 Sketch 组件的地图，并在该组件中实现了多选形状的功能。当用户在 Sketch 组件中创建一个多边形时，该代码会选择所有在该多边形内的图形，并在视图中突出显示它们。注意，该代码仅适用于多边形选择，如果需要支持其他形状的选择，需要进行相应的修改。