JavaScript ArcGIS TileLayer.portalItem用法及代碼示例

基本信息

以下是所在類或對象的基本信息。

AMD: require(["esri/layers/TileLayer"], (TileLayer) => { /* code goes here */ });

ESM: import TileLayer from "@arcgis/core/layers/TileLayer";

類： esri/layers/TileLayer

繼承: TileLayer > Layer > Accessor

自從：用於 JavaScript 4.0 的 ArcGIS API

用法說明

TileLayer.portalItem函數(或屬性)的定義如下：

portalItem PortalItem

從中加載圖層的門戶項目。如果門戶項目引用要素服務或場景服務，則您可以使用 layerId 屬性指定要加載的單個圖層。

從版本 4.17 開始，可以從托管在 ArcGIS Online 和 ArcGIS Enterprise 中的要素服務項目加載表。這僅適用於 feature layers ，如果 FeatureLayer.isTable 返回 true 將成功加載。

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);
  }
});

相關用法

注：本文由純淨天空篩選整理自arcgis.com大神的英文原創作品 TileLayer.portalItem。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。