AppDataModel is retained

Question

gebs OP

Created Jul ’23

Replies 2

Boosts 0

Participants 2

Hi,

In the scanning objects using object capture project, when the content view is dismissed the AppDataModel is always retained and the deinit is never called.

@StateObject var appModel: AppDataModel = AppDataModel.instance

I am presenting the contentView using a UIHostingController

       let hostingController = UIHostingController(rootView: ContentView())
        hostingController.modalPresentationStyle = .fullScreen
        present(hostingController, animated: true)

I have tried to manually detach the listeners and setting the objectCaptureSession to nil.

In the debug memory graph there is a coachingoverlay retaining the AppDataModel.

I want to remove the appModel from memory when the contentView is dismissed.

Any suggestions?

Boost

Answer 1

MobileTen OP

Jul ’23

If instance is a singleton, then that is the cause of your retain issue. @StateObject is all you need with AppDataModel inited.

@StateObject var appModel = AppDataModel()

0

Answer 2

gebs OP

Jul ’23

Here is the memory graph:

Screenshot 2023-07-25 at 1.54.57 PM.png

I've tried canceling the objectCaptureSession :

   objectCaptureSession?.cancel()
   objectCaptureSession = nil

and detaching the listeners

  for sub in subscriptions {
            sub.cancel()
        }
        subscriptions = Set<AnyCancellable>()

Could it be a leak in the ARCoachingOverlayView?

0