我想在iPhone8上运行基于Unity / Vuforia的游戏，但出现一些错误。
构建了Unity脚本和所有IOS代码，我能够在手机上拉起应用主屏幕，但是在尝试更多使用该应用时出现以下运行时错误...
2019-06-17 10:43:46.724546-0500 normal[397:19830] ERROR/AR(397) 2019-06-18 10:43:46: ObjectTracker: Failed to activate data set because the data set is already active.
Could not activate dataset.
Vuforia.ObjectTracker:ActivateDataSet(DataSet)
StartUI:StartPressed()
UnityEngine.Events.UnityEvent:Invoke()
UnityEngine.EventSystems.ExecuteEvents:Execute(GameObject, BaseEventData, EventFunction`1)
UnityEngine.EventSystems.StandaloneInputModule:ProcessTouchPress(PointerEventData, Boolean, Boolean)
UnityEngine.EventSystems.StandaloneInputModule:ProcessTouchEvents()
UnityEngine.EventSystems.StandaloneInputModule:Process()
(Filename: ./Runtime/Export/Debug.bindings.h Line: 45)
Failed to start tracker
UnityEngine.Events.UnityEvent:Invoke()
UnityEngine.EventSystems.ExecuteEvents:Execute(GameObject, BaseEventData, EventFunction`1)
UnityEngine.EventSystems.StandaloneInputModule:ProcessTouchPress(PointerEventData, Boolean, Boolean)
UnityEngine.EventSystems.StandaloneInputModule:ProcessTouchEvents()
UnityEngine.EventSystems.StandaloneInputModule:Process()
(Filename: ./Runtime/Export/Debug.bindings.h Line: 45)