修改底图

@@ -5,72 +5,42 @@ require([
     "esri/views/MapView",
     "esri/Basemap",
     "esri/layers/TileLayer",
-    "esri/geometry/Extent",
+    "esri/geometry/Extent"
 ], function (Map, MapView, Basemap, TileLayer, Extent) {
-    let yingxiang_imageMap = new TileLayer({
-        url: 'https://192.168.5.164:6443/arcgis/rest/services/xzsj/ygyx/MapServer'   // 影像地图
-    });
+
     let dianzi_imageMap = new TileLayer({
         url: 'https://192.168.5.164:6443/arcgis/rest/services/xzsj/ygyx/MapServer' //电子底图
     });
 
-    var basemapIcon = {
-        yxdt: 'image/dzdt_normal.png',
-        dzdt: '/image/yxdt_normal.png'
-    }
     let ext = new Extent({
-        "xmax": 1.1332182150213555E7,
-        "ymax": 4379415.470661429,
-        "xmin": 1.1339935515720293E7,
-        "ymin": 4383168.328167147,
+        xmin: 1.1333776806012768E7,
+        ymin: 4378389.417203172,
+        xmax: 1.133851590176645E7,
+        ymax: 4382058.3945608605,
         "spatialReference": {
             "wkid": 3857
         }
     });
 
-    let electronBaseMap = new Basemap({
-        baseLayers: [dianzi_imageMap],
-        title: 'electronicMap',
-        id: 'electronicMap'
-})
-    ;
+    var basemap = new Basemap({
+        baseLayers: [
+            new MapImageLayer({
+                url: "https://192.168.5.164:6443/arcgis/rest/services/xzsj/ygyx/MapServer",
+                title: "Basemap"
+            })
+        ],
+        title: "basemap",
+        id: "basemap"
+    });
     var map = new Map({
-        basemap: electronBaseMap
+        basemap: basemap
     });
     var view = new MapView({
         container: "map",
         map: map,
-        extent: ext,
-        zoom: 1
+        constraints: {
+            lods: TileInfo.create().lods
+        },
+        zoom: 12
     });
-
-/*        $(function () {
-            $('#trigger').attr('src',basemapIcon.dzdt);
-            $('#trigger').click(function () {
-
-        /!*        var basemaps = [];
-                for (var key in basemapIcon) {
-                    var items = mapview.allLayerViews.items;
-                    for (var i in items) {
-                        var item = items[i];
-                        if (item.layer && item.layer.id == key) {
-                            basemaps.push(item);
-                            break;
-                        }
-                    }
-                }
-                if (basemaps.length != 2) {
-                    return false;
-                }
-                if (basemaps[0].layer.visible) {
-                    basemaps[1].layer.visible = true;
-                    basemaps[0].layer.visible = false;
-                    this.setAttribute('src', basemapIcon.dzdt);
-                } else {
-                    basemaps[0].layer.visible = true;
-                    basemaps[1].layer.visible = false;
-                    this.setAttribute('src', basemapIcon.yxdt);
-                }*!/
-            })
-    });*/
 });
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