图层中的字段数组。每个字段表示一个属性,该属性可能包含图层中每个要素的值。例如,名为
POP_2015
的字段将有关总人口的信息存储为每个特征的数值;此值表示居住在要素地理范围内的总人数。从客户端函数创建 FeatureLayer 时,应在构造函数中与源属性一起设置此属性。还必须在此数组或 objectIdField 属性中设置
objectId
字段。例子:
// define each field's schema const fields = [ new Field({ name: "ObjectID", alias: "ObjectID", type: "oid" }), new Field({ name: "description", alias: "Description", type: "string" }), new Field ({ name: "title", alias: "Title", type: "string" }) ]; // See the sample snippet for the source and renderer properties const layer = new FeatureLayer({ // geometryType and spatialReference are inferred // from the input source features source: features, // Object ID field is inferred from the fields array fields: fields, renderer: renderer });
基本信息
以下是所在类或对象的基本信息。
AMD:
require(["esri/layers/FeatureLayer"], (FeatureLayer) => { /* code goes here */ });
ESM:
import FeatureLayer from "@arcgis/core/layers/FeatureLayer";
类:
esri/layers/FeatureLayer
继承: FeatureLayer > Layer > Accessor
自从:用于 JavaScript 4.0 的 ArcGIS API
用法说明
FeatureLayer.fields
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 FeatureLayer.fields。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。