-
layerId
Number
要素服务图层的图层 ID 或图层索引。当从包含多个图层的服务加载带有 PortalItem 属性的单个 SubtypeGroupLayer 时,这特别有用。您可以在以下两种情况之一指定此值:
- 通过 PortalItem 属性加载图层时。
- 将图层 url 直接指向要素服务时。
如果在上述任一情况下均未指定 layerId,则选择服务中的第一层 (
layerId = 0
)。例子:
// loads the third layer in the given Portal Item const layer = new SubtypeGroupLayer({ portalItem: { id: "8d26f04f31f642b6828b7023b84c2188" }, layerId: 2 });
// If not specified, the first layer (layerId: 0) will be returned const layer = new SubtypeGroupLayer({ portalItem: { id: "8d26f04f31f642b6828b7023b84c2188" } });
// Can also be used if URL points to service and not layer const layer = new SubtypeGroupLayer({ // Notice that the url doesn't end with /2 url: "http://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/MonterreyBayCanyon_WFL/FeatureServer", layerId: 2 });
// This code returns the same layer as the previous snippet const layer = new SubtypeGroupLayer({ // The layer id is specified in the URL url: "http://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/MonterreyBayCanyon_WFL/FeatureServer/2", });
基本信息
以下是所在类或对象的基本信息。
AMD:
require(["esri/layers/SubtypeGroupLayer"], (SubtypeGroupLayer) => { /* code goes here */ });
ESM:
import SubtypeGroupLayer from "@arcgis/core/layers/SubtypeGroupLayer";
类:
esri/layers/SubtypeGroupLayer
继承: SubtypeGroupLayer > Layer > Accessor
自从:用于 JavaScript 4.20 的 ArcGIS API
用法说明
SubtypeGroupLayer.layerId
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 SubtypeGroupLayer.layerId。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。