How to reload existing map and view?

ChristianKempis — Fri, 12 Jun 2020 21:50:21 GMT

Hi im currently using the API and react to build a site which houses a map as its primary page. The map loads fine with all of its layers, however i currently have logic that allows me to "hide" the map div for other elements to show. I want to be able to reselect my map from the navigation bar I have setup and reload my old map.

At the moment the map does not display when i try to reshow the div containing the map.

return (
<div>
   ...
   { this.state.showMap === true && ref={this.mapViewReference }
   ...
</div>

The data for the old map still exists with all of its layers etc i just want to be able to reload the map.

Re: How to reload existing map and view?

ChristianKempis — Sat, 13 Jun 2020 00:33:47 GMT

So i was able to come out with a solution however i feel this is a very hacky work around to a feature that arcgis should have by default.

I had to essentially take the object holding my previous map state and copy all of it into a new map with initialization.

const reloadMap (domElementRef) => {
   let oldMap = Object.assign({}, mapObject)
   const map = new Map({
      basemap: oldMap.basemap,
    layers: oldMap.mapView.map.layers
   })

   const view = new MapView({
      container: domElementRef,
      map: map
      ....
   })
}

Code similar to above allows the map to completely reload. Note: you will have to readd ui elements again as attempting to directely copy ui elements from the old object does not work. If anyone has a better solution im open to suggestions

topic How to reload existing map and view? in ArcGIS JavaScript Maps SDK Questions

How to reload existing map and view?

Re: How to reload existing map and view?