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portalItem
PortalItem
从中加载图层的门户项目。如果门户项目引用要素服务或场景服务,则您可以使用 layerId 属性指定要加载的单个图层。
从版本 4.17 开始,可以从托管在 ArcGIS Online 和 ArcGIS Enterprise 中的要素服务项目加载表。这仅适用于 feature layers ,如果 FeatureLayer.isTable 返回
true
将成功加载。例子:
// While this example uses FeatureLayer, this same pattern can be // used for other layers that may be loaded from portalItem ids. const lyr = new FeatureLayer({ portalItem: { // autocasts as new PortalItem() id: "caa9bd9da1f4487cb4989824053bb847" } // the first layer in the service is returned });
// Set hostname when using an on-premise portal (default is ArcGIS Online) // esriConfig.portalUrl = "http://myHostName.esri.com/arcgis"; // While this example uses FeatureLayer, this same pattern can be // used for SceneLayers. const lyr = new FeatureLayer({ portalItem: { // autocasts as new PortalItem() id: "8d26f04f31f642b6828b7023b84c2188" }, // loads the third item in the given feature service layerId: 2 });
// This snippet loads a table hosted in ArcGIS Online. const table = new FeatureLayer({ portalItem: { // autocasts as esri/portal/PortalItem id: "123f4410054b43d7a0bacc1533ceb8dc" } }); // Before adding the table to the map, it must first be loaded and confirm it is the right type. table.load().then(function() { if (table.isTable) { map.tables.add(table); } });
基本信息
以下是所在类或对象的基本信息。
AMD:
require(["esri/layers/WMSLayer"], (WMSLayer) => { /* code goes here */ });
ESM:
import WMSLayer from "@arcgis/core/layers/WMSLayer";
类:
esri/layers/WMSLayer
继承: WMSLayer > Layer > Accessor
自从:用于 JavaScript 4.4 的 ArcGIS API
用法说明
WMSLayer.portalItem
函数(或属性)的定义如下:
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注:本文由纯净天空筛选整理自arcgis.com大神的英文原创作品 WMSLayer.portalItem。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。