## 一、指南针 官方API：https://developers.arcgis.com/javascript/latest/api-reference/esri-widgets-Compass.html  ~~~ // 先引入 esri/widgets/Compass 模块 var compass = new Compass({view: mapView}); mapView.ui.add(compass, "top-left"); ~~~ ## 二、缩放按钮 官方API：https://developers.arcgis.com/javascript/latest/api-reference/esri-widgets-Zoom.html  ~~~ // 先引入 esri/widgets/Zoom 模块 var zoom = new Zoom({ view: mapView }); mapView.ui.add(zoom, "top-right"); ~~~ 等等在esri/widgets里