RealityKit cannot load Entity

Question

Created Jul ’23

Replies 2

Boosts 0

Participants 3

Very often when I try to load an Entity in RealityView the system give me an error: The operation couldn’t be completed. (Swift.CancellationError error 1.)

RealityView { content in
    do {
        let scene = try await Entity(named: "Test_Scene", in: realityKitContentBundle)
        content.add(scene)
        
    } catch {
        debugPrint("error loading scene", error.localizedDescription.debugDescription)
    }
}

The scene I created contain a basic square Screenshot 2023-07-13 at 15.04.37.jpeg

This is the main file

struct first_app_by_appleApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }.windowStyle(.volumetric)
    }
}

and inside info.plist file I setup UIApplicationPreferredDefaultSceneSessionRole with UIWindowSceneSessionRoleVolumetricApplication

I think that could be a bug of the system but I'm not surprised since it's the first beta. If so, do you know any workarounds?

Answered by Vision Pro Engineer in 759044022

This issue usually happens when the RealityView deinits before its tasks are completed. A solution to this issue is to handle the CancellationError like this:

RealityView { content in
    do {
        let scene = try await Entity(named: "Test_Scene", in: realityKitContentBundle)
        content.add(scene)
    } catch is CancellationError { /*ignore*/
    } catch {
        assertionFailure("\(error.localizedDescription)")
    }
}

Boost

Answer 1

Graphics and Games Engineer OP

Apple

Jul ’23

Accepted Answer

This seems like a bug, could you file a bug report on Feedback Assistant and attach your sample project?

1

Answer 2

Vision Pro Engineer OP

Apple

Jul ’23

Recommended

This issue usually happens when the RealityView deinits before its tasks are completed. A solution to this issue is to handle the CancellationError like this:

RealityView { content in
    do {
        let scene = try await Entity(named: "Test_Scene", in: realityKitContentBundle)
        content.add(scene)
    } catch is CancellationError { /*ignore*/
    } catch {
        assertionFailure("\(error.localizedDescription)")
    }
}

0