ArcGIS API for JavaScript

js api 4.x graphic 不能被打印

地图的图层能够正常打印

地图自带的测距测面工具也可以正常打印

自定义绘制的图形图层不能打印出来（蓝色范围即自定义绘制图形图层，图1即打印结果：未显示图形图层）

打印的代码

var print = new Print({

	view: view,

	container: 'printbox',

	printServiceUrl: "http://******/arcgis/rest/services/Utilities/PrintingTools/GPServer/Export%20Web%20Map%20Task"

});

生成图形图层的代码

var printgraphic = new GraphicsLayer()

map.layers.add(printgraphic)

const graphic = new Graphic({

     geometry: {

      type: "polygon",

      rings: _rings,

      spatialReference: view.spatialReference

     },

     symbol: {

      type: "simple-line", // autocasts as new SimpleFillSymbol

      color: [4, 90, 141],

      width: 4,

      cap: "round",

      join: "round"

     }

    });

    printgraphic.graphics.add(graphic)