GraphicLayer

简单示例

import Map from "@arcgis/core/Map"
import MapView from "@arcgis/core/views/MapView"
import GraphicsLayer from "@arcgis/core/layers/GraphicsLayer"
import Graphic from "@arcgis/core/Graphic"

const graphicLayer = new GraphicsLayer()

const map = new Map({
  basemap: 'dark-gray',
  layers: [ graphicLayer ]
})

const mapView = new MapView({
  map,
  container: 'js_map',
  center: [102.92934063304513, 25.102234987110343]
})

const polygonGraphic = new Graphic({
  geometry: {
    type: "polygon",
    rings: [
      [  // 第1个 ring
        [-97.06138,32.837,35.1,4.8],
        [-97.06133,32.836,35.2,4.1],
        [-97.06124,32.834,35.3,4.2],
        [-97.06138,32.837,35.1,4.8]  // 和起点一样
      ], [  // 第2个 ring
        [-97.06326,32.759,35.4],
        [-97.06298,32.755,35.5],
        [-97.06153,32.749,35.6],
        [-97.06326,32.759,35.4]  // 和起点一样
      ]
    ]
  },
  symbol: {
    type: "simple-fill",
    color: [227, 139, 79, 0.8],
    outline: {
      color: [255, 255, 255],
      width: 1
    }
  }
})

graphicLayer.add(polygonGraphic)

相关方法：

• add()，增加一个，传一个 graphic
• addMany()，增加多个，传一个 graphic 数组
• remove()，删除一个，传一个 graphic
• removeMany()，删除多个，传一个 graphic 数组
• removeAll()，删除所有