-
layerId
Number
场景服务图层的图层 ID 或图层索引。当从包含多个图层的服务加载带有 PortalItem 属性的单个图层时,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 直接指向场景服务时。
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:
// while these examples use a SceneLayer, the same pattern can be // used for other layers that may be loaded from portalItem ids // loads the third layer in the given Portal Item let layer = new SceneLayer({ portalItem: { id: "73df987984b24094b848d580eb83b0fb" }, layerId: 2 });
// If not specified, the first layer (layerId: 0) will be returned let layer = new SceneLayer({ portalItem: { id: "73df987984b24094b848d580eb83b0fb" } });
// Can also be used if URL points to service and not layer let layer = new SceneLayer({ url: "https://scenesampleserverdev.arcgis.com/arcgis/rest/services/Hosted/DevA_Trees/SceneServer", layerId: 0 // Notice that the url doesn't end with /2 });
// This code returns the same layer as the previous snippet let layer = new SceneLayer({ url: "https://scenesampleserverdev.arcgis.com/arcgis/rest/services/Hosted/DevA_Trees/SceneServer/layers/0", // The layer id is specified in the URL });
基本信息
以下是所在类或对象的基本信息。
AMD:
require(["esri/layers/SceneLayer"], (SceneLayer) => { /* code goes here */ });
ESM:
import SceneLayer from "@arcgis/core/layers/SceneLayer";
类:
esri/layers/SceneLayer
继承: SceneLayer > Layer > Accessor
自从:用于 JavaScript 4.0 的 ArcGIS API
用法说明
SceneLayer.layerId
函数(或属性)的定义如下:
相关用法
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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 SceneLayer.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。