使用Swift的iOS应用程序上的移动格式塔支持错误

Question

我的项目出现以下错误，我不确定是什么导致它。

2017-04-04 10:28:39.243789-0500 GBus3[797:148184] libMobileGestalt 
MobileGestaltSupport.m:153: pid 797 (GBus3) does not have sandbox access for 
frZQaeyWLUvLjeuEK43hmg and IS NOT appropriately entitled
2017-04-04 10:28:39.243948-0500 GBus3[797:148184] libMobileGestalt 
MobileGestalt.c:550: no access to InverseDeviceID (see 
<rdar://problem/11744455>)
fatal error: unexpectedly found nil while unwrapping an Optional value
2017-04-04 10:28:43.106075-0500 GBus3[797:148184] fatal error: unexpectedly 
found nil while unwrapping an Optional value

我相信使用segue在视图控制器之间切换时会发生错误。

这是执行segue的代码

func didTapTrackButton () {

    performSegue(withIdentifier: "HomeToTrack", sender: self)
}

这是加载第二个视图控制器的代码

override func loadView() {
    super.loadView()
    // Building a view
    let screenFrame = UIScreen.main.bounds
    let contentView = UIView(frame: screenFrame)

    // Add Map
    self.mapView = MKMapView(frame: screenFrame)
    self.mapView.delegate = self
    contentView.addSubview(self.mapView)

    // Set Tracking
    self.locationManager.delegate = self
    self.locationManager.requestAlwaysAuthorization()
    self.mapView.setUserTrackingMode(MKUserTrackingMode.follow, animated: true)

    // Set the built view as our view
    self.view = contentView
}