App stürzt ab, nachdem IOS Karte GPS Navigation gestartet und zur App

Question

Ich versuche, die GPS-Navigation mit den folgenden Codes zu starten, aber meine App stürzt ab und es sagt mir nichts. Die Karten-App und Turn-by-Turn-Navigation startet gut und läuft gut, nachdem es initiiert wurde, aber meine App abstürzt.

AKTUALISIERT

Sorry, lassen Sie mich mehr Kontext hinzufügen. Nachdem die Navigation und GPS gestartet sind und ich versuche, zu meiner App zurückzukehren, stürzt die App ab. Hier ist der vollständige Code.

import UIKit 
import MapKit 
import CoreData 

class DetailViewController: UIViewController { 

    var pho : Pho? = nil 

    @IBOutlet var titleLabel: UILabel! 

    @IBOutlet var phoneLabel: UILabel! 

    @IBOutlet var addressLabel: UILabel! 

    @IBOutlet var zomatoLabel: UILabel! 

    @IBOutlet var googleLabel: UILabel! 

    @IBOutlet var yelpLabel: UILabel! 

    @IBOutlet var mapView: MKMapView! 

    @IBOutlet var saveButton: UIButton! 

    override func viewDidLoad() { 
     super.viewDidLoad() 
     // Do any additional setup after loading the view, typically from a nib. 



     // We need just to get the documents folder url 
     let documentsUrl = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask).first! 

     //   now lets get the directory contents (including folders) 

//  do { 
//   let directoryContents = try NSFileManager.defaultManager().contentsOfDirectoryAtURL(documentsUrl, includingPropertiesForKeys: nil, options: NSDirectoryEnumerationOptions()) 
//   print(directoryContents) 
//    
//   for x in directoryContents { 
//    print(x) 
//   } 
//    
//  } catch let error as NSError { 
//   print(error.localizedDescription) 
//  } 




    } 

    override func viewWillAppear(animated: Bool) { 

     self.titleLabel.text = self.pho!.name 
     self.phoneLabel.text = String(self.pho!.phoneNumber) 
     self.addressLabel.text = self.pho!.address 

     self.zomatoLabel.text = "\(self.pho!.rating) - \(self.pho!.votes) reviews" 

     self.googleLabel.text = "\(self.pho!.gRating)" 

     self.yelpLabel.text = "\(self.pho!.yRating) - \(self.pho!.yVotes) reviews" 

     let latitudeAnn:CLLocationDegrees = self.pho!.latitude 
     let longitudeAnn:CLLocationDegrees = self.pho!.longitude 

     let latDelta:CLLocationDegrees = 0.05 
     let lonDelta:CLLocationDegrees = 0.05 

     let span:MKCoordinateSpan = MKCoordinateSpanMake(latDelta, lonDelta) 

     let location:CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitudeAnn, longitudeAnn) 

     let region:MKCoordinateRegion = MKCoordinateRegionMake(location, span) 

     let annotation = MKPointAnnotation() 

     annotation.coordinate = location 

     self.mapView.addAnnotation(annotation) 

     self.mapView.setRegion(region, animated: true) 
     let appDel: AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate 

     let context: NSManagedObjectContext = appDel.managedObjectContext 

     let request = NSFetchRequest(entityName: "Restaurant") 
     //  request.predicate = NSPredicate(format: "latitude = %@", latitude) 
     let firstPredicate = NSPredicate(format: "name = %@", "\(self.pho!.name)") 
     let secondPredicate = NSPredicate(format: "address = %@", "\(self.pho!.address)") 
     request.returnsObjectsAsFaults = false 

     request.predicate = NSCompoundPredicate(type: NSCompoundPredicateType.AndPredicateType, subpredicates: [firstPredicate, secondPredicate]) 

     do { 

      let results = try context.executeFetchRequest(request) 

      if results.count > 0 { 
       print(results) 
       self.saveButton.hidden = true 

       for result in results as! [NSManagedObject] { 


       } 
      } 
     } catch { 
     } 
    } 


    @IBAction func initDirection(sender: AnyObject) { 



       let latitudeAnn:CLLocationDegrees = self.pho!.latitude 
       let longitudeAnn:CLLocationDegrees = self.pho!.longitude 

       let coordinates:CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitudeAnn, longitudeAnn) 

       let launchOptions = [MKLaunchOptionsDirectionsModeKey : MKLaunchOptionsDirectionsModeDriving] 
       let placemark = MKPlacemark(coordinate: coordinates, addressDictionary: nil) 
       let mapItem = MKMapItem(placemark: placemark) 

       mapItem.name = "\(self.pho!.name)" 

       mapItem.openInMapsWithLaunchOptions(launchOptions) 


    } 

    @IBAction func savePho(sender: AnyObject) { 

     self.saveButton.hidden = true 

     let appDel: AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate 

     let context: NSManagedObjectContext = appDel.managedObjectContext 

     let newRestaurant = NSEntityDescription.insertNewObjectForEntityForName("Restaurant", inManagedObjectContext: context) 

     newRestaurant.setValue(self.pho!.latitude, forKey: "latitude") 

     newRestaurant.setValue(self.pho!.longitude, forKey: "longitude") 

     newRestaurant.setValue(self.pho!.name, forKey: "name") 

     newRestaurant.setValue(self.pho!.phoneNumber, forKey: "phone") 

     newRestaurant.setValue(self.pho!.address, forKey: "address") 

     do { 
      try context.save() 
     } catch { 
      print("There was a problem") 
     } 
    } 

} 

Answer 1

So fand ich heraus, dass das XML beschädigt war. Meine Codes waren in Ordnung. Ich habe einen anderen View Controller erstellt, alle Widgets hinzugefügt und meine Codes verbunden und alles funktioniert.