影像无限放大的三种方法

this.layer.tileLayer = new this.esri.TileLayer({ url })

this.layer.baseLayer = new this.esri.TileLayer({ url })
const groupLayer = new this.esri.GroupLayer({
        layers: [
          this.layer.tileLayer,
          // graphicsLayer
        ]
      }) 
this.map = new this.esri.Map({
        layers: [groupLayer]
      })  

// 4.19 无法设置值，默认支持24层级
const tileInfo = esri.TileInfo.create()
// 4.20 及以上的版本适用
const tileInfo = esri.TileInfo.create({
　　numLODs: 26
})
this.map = new esri.Map({
  layers: [baseLayer, groupLayer],
})
this.mapView = new esri.MapView({
  container: ‘webMap‘,
  map: this.map,
  constraints: {
    lods: tileInfo.lods,
  },
})