-
refresh
- 自从:ArcGIS 适用于 JavaScript 4.21 的 API
如果图层设置了刷新间隔或调用 refresh() 方法时触发。事件负载指示图层数据是否已更改。
- 属性:
-
类型 说明 dataChanged Boolean指示图层的数据是否已更改。
例子:
// listen to layer's refresh event to fetch the attachments // for the updated features. layer.on("refresh", function(event){ if (event.dataChanged){ const query = layer.createQuery(); layer.queryObjectIds(query).then(function (objectIds) { let attachmentQuery = { objectIds: objectIds, definitionExpression: layer.definitionExpression, attachmentTypes: ["image/jpeg"] }; layer.queryAttachments(attachmentQuery).then(function (attachments) { attachmentQuery.objectIds.forEach(function (objectId) { if (attachments[objectId]) { // process the updated attachments let attachment = attachments[objectId]; } }); }) .catch(function (error) { console.log("attachment query error", error); }); }); } });
基本信息
以下是所在类或对象的基本信息。
AMD:
require(["esri/layers/BaseDynamicLayer"], (BaseDynamicLayer) => { /* code goes here */ });
ESM:
import BaseDynamicLayer from "@arcgis/core/layers/BaseDynamicLayer";
类:
esri/layers/BaseDynamicLayer
继承: BaseDynamicLayer > Layer > Accessor
自从:用于 JavaScript 4.4 的 ArcGIS API
用法说明
BaseDynamicLayer refresh事件
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 BaseDynamicLayer refresh event。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。