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Vuforia Restarts Unexepectedly

May 21, 2019 - 6:50am #1

1. Scene starts with Vuforia

2. Once detection of image occurs, we stop Vuforia

CameraDevice.Instance.Stop();

TrackerManager.Instance.GetTracker<ObjectTracker>().Stop();

3. Out of the blue the Application restarts, and so does Vuforia. This causes the application to freeze for several seconds.

-> applicationWillResignActive()

Stop Vuforia Engine

Vuforia.VuforiaARController:StopVuforia()

Vuforia.VuforiaARController:OnApplicationPause(Boolean)

System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)

System.Delegate:DynamicInvokeImpl(Object[])

Vuforia.DelegateHelper:InvokeDelegate(Delegate, Object[])

Vuforia.DelegateHelper:InvokeWithExceptionHandling(Action`1, T)



(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 48)

-> applicationDidBecomeActive()

2019-05-21 15:42:09.574118+0200 VisualAgenda[1923:394930] INFO/AR(1923) 2019-05-22 15:42:09: Matched precache profile for Apple, iPhone10,6, iOS 12, 800.1

2019-05-21 15:42:09.808365+0200 VisualAgenda[1923:394930] INFO/AR(1923) 2019-05-22 15:42:09: Vuforia Fusion: Detected and enabled use of ARKit

2019-05-21 15:42:09.808957+0200 VisualAgenda[1923:394930] DEBUG/AR(1923) UIView has CAMetalLayer layer class

2019-05-21 15:42:09.809029+0200 VisualAgenda[1923:394930] DEBUG/AR(1923) UIView does not respond to selector renderFrameVuforia

2019-05-21 15:42:09.809084+0200 VisualAgenda[1923:394930] DEBUG/AR(1923) UIView has CAMetalLayer layer class

2019-05-21 15:42:09.809198+0200 VisualAgenda[1923:394930] DEBUG/AR(1923) UIView does not respond to selector renderFrameVuforia

2019-05-21 15:42:09.809277+0200 VisualAgenda[1923:394930] DEBUG/AR(1923) Could not find a UIView with CAEAGLLayer or CAMetalLayer layer class that responds to selector renderFrameVuforia

Start Vuforia Engine

Vuforia.VuforiaARController:StartVuforia(Boolean)

Vuforia.VuforiaARController:OnApplicationPause(Boolean)

System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)

System.Delegate:DynamicInvokeImpl(Object[])

Vuforia.DelegateHelper:InvokeDelegate(Delegate, Object[])

Vuforia.DelegateHelper:InvokeWithExceptionHandling(Action`1, T)



(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 48)

cameraDeviceStartCamera

2019-05-21 15:42:09.815351+0200 VisualAgenda[1923:394930] INFO/AR(1923) 2019-05-22 15:42:09: Starting camera with profile for iPhone10,6, 800.1

 

 

Any ideas on how to prevent this unwanted behavior?

Vuforia Restarts Unexepectedly

May 21, 2019 - 7:58am #3

Hello,

From the way I read it, it sounds like a chicken-and-egg problem. If the application restarts, then Vuforia will restart as well.

So is it the application that is causing the restart, or Vuforia Engine? The latter seems unlikely unless the SDK is crashing and we'd be very interested in getting a crash dump log.

Thanks,

Vuforia Engine Support

Vuforia Restarts Unexepectedly

May 21, 2019 - 7:49am #2

Using OpenGLES3 over Metal may be a fix. Not sure yet.

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