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Vuforia Restarts Unexepectedly

By emorling on Tue, 05/21/2019 - 13:50

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?

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.