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Swift IOS - Camera focus view

JyoshnaRani

Camera focused using map extent (4 co ordinates min – max X and min – max Y).

My Code:

self.map.maxExtent = Envelope(xMin: self.xMin!, yMin: self.yMin!, xMax: self.xMax!, yMax: self.yMax!, spatialReference: .wgs84)

self.map.initialViewpoint = Viewpoint(boundingGeometry: self.map.maxExtent!.center, camera: Camera(lookingAt: self.map.maxExtent!.center, distance: 5500, heading: 150, pitch: 20, roll: 0))

But its not working. That means Camera is not focusing on view map.

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Ting

See this sample https://github.com/Esri/arcgis-runtime-samples-ios/blob/main/arcgis-ios-sdk-samples/Maps/Set%20initial%20map%20area/SetInitialMapAreaViewController.swift

Let me know if it helps or you have more questions.

JyoshnaRani

Hello Ting,

Thank you for your answer. But I'm looking for swift UI View.

Like :

struct GisMapView: View {
  var map = Map(basemapStyle: .arcGISTopographic) 

  func loadMap(){
   self.map.maxExtent = Envelope(xMin: self.xMin!, yMin: self.yMin!, xMax: self.xMax!, yMax: self.yMax!, spatialReference: .wgs84)
   self.map.initialViewpoint = Viewpoint(boundingGeometry: self.map.maxExtent!.center, camera: Camera(lookingAt: self.map.maxExtent!.center, distance: 5500, heading: 150, pitch: 20, roll: 0))
  }

  var body: some View {
   MapView(map: map)
  }
}

This is the code I wrote but it's not reflecting on map. Map is loading but not in particular camera location.

Hope this way I explained my query.

Ting

There are multiple issues with your snippet

Please note the difference between a Map and a Scene in ArcGIS context. In other mapping frameworks, they may call a Scene something like "3D map" or "Globe mode", etc. In ArcGIS, 3D mapping is specifically represented as a scene. Therefore, in order to set a camera angle, you'll need a 3D scene so it allows the 3D perspectives.
Currently we only support "global scenes" in the Swift API, while local scene is under development. See this article for the difference between these two. In short, global is a globe, local is a plane.
It is a common mistake to pass in out of range values to a certain spatial reference. For example, WGS 84 allows -89 ~ +89 latitude, -180 ~ +180 longitude. If the values to create an Envelope is greater than those ranges, the geometry would be invalid. I'm assuming you understand the difference there.
For a 3D scene, setting the camera will override the bounding geometry. That is, no matter what bounding geometry you pass in for a 3D scene, if there is a camera, it will use the camera first.
Please note the importance of using State property wrapper in SwiftUI. By marking a geomodel as a state, it retains the source-of-truth-ness of it. Read this article to get a better understanding.

With all these said, check out this sample to get an idea: https://github.com/Esri/arcgis-maps-sdk-swift-samples/blob/main/Shared/Samples/Display%20scene/DisplaySceneView.swift

Let me know if you have more questions.

JyoshnaRani

Hello Ting,

In my previous reply I tried to tell that - I am using 'View' in swift SDK for ArcGIS. That is just a sample code where I can show you - I am not using "UIViewController " as you provided in a solution - "See this sample https://github.com/Esri/arcgis-runtime-samples-ios/blob/main/arcgis-ios-sdk-samples/Maps/Set%20initi..."

So I am looking a class example of ArcGIS which is extended with View not UIViewController, and I am using ArcGIS SDK for Swift not ArcGIS SDK for IOS.

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