RealmSwiftを用いたSwift3でのGPSログでの"Thread 1:signal SIGABRT"について

Question

###前提・実現したいこと
アプリケーションの実装

###発生している問題・エラーメッセージ
RealmSwiftでGPSロガーを作成しようとしているのですが、"Thread 1:signal SIGABRT"が出てきてエラーの原因がわかりません。Storyboardでのコンポーネントの接続もできています。
以下の部分まではデバックできるのですが、、、

ここをすぎるとAppDelegate.swiftでこのようになってしまいます。

このサイトを参考にさせていただきました。→参考サイト
ほとんど写経しただけです。

import UIKit
import MapKit
import RealmSwift

class Location: Object {
    dynamic var latitude: Double = 0.0
    dynamic var longitude: Double = 0.0
    dynamic var createdAt = Date(timeIntervalSince1970: 1)
}

class ViewController: UIViewController, CLLocationManagerDelegate {
    
    @IBOutlet weak var mapView: MKMapView!
    @IBOutlet weak var startButton: UIButton!
    @IBOutlet weak var tableView: UITableView!
    
    var locationManager: CLLocationManager!
    var locations: Results<Location>!
    var token: NotificationToken!
    var isUpdating = false
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Do any additional setup after loading the view, typically from a nib.
        self.locationManager = CLLocationManager()
        self.locationManager.delegate = self
        self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
        self.locationManager.distanceFilter = 100
        
        // Delete old location objects
        self.deleteOldLocations()
        
        // Load stored location objects
        self.locations = self.loadStoredLocations()
        
        // Drop pins
        for location in self.locations {
            self.dropPin(at: location)
        }
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    
    // MARK: - Private methods
    
    @IBAction func startButtonDidTap(_ sender: AnyObject) {
        self.toggleLocationUpdate()
    }
    
    @IBAction func clearButtonDidTap(_ sender: AnyObject) {
        self.deleteAllLocations()
        self.locations = self.loadStoredLocations()
        self.removeAllAnnotations()
        self.tableView.reloadData()
    }
    
    // Load locations stored in realm at the table view
    fileprivate func loadStoredLocations() -> Results<Location> {
        // Get the default Realm
        let realm = try! Realm()
        
        // Load recent location objects
        return realm.objects(Location.self).sorted(byKeyPath: "createdAt", ascending: false)
    }
    
    // Start or Stop location update
    fileprivate func toggleLocationUpdate() {
        let realm = try! Realm()
        if self.isUpdating {
            // Stop
            self.isUpdating = false
            self.locationManager.stopUpdatingLocation()
            self.startButton.setTitle("Start", for: UIControlState())
            
            // Remove a previously registered notification
            if let token = self.token {
                token.stop()
            }
        } else {
            // Start
            self.isUpdating = true
            self.locationManager.startUpdatingLocation()
            self.startButton.setTitle("Stop", for: UIControlState())
            
            // Add a notification handler for changes
            self.token = realm.addNotificationBlock {
                [weak self] notification, realm in
                self?.tableView.reloadData()
            }
        }
    }
    
    // Store object
    fileprivate func addCurrentLocation(_ rowLocation: CLLocation) {
        let location = makeLocation(rawLocation: rowLocation)
        
        // Get the default Realm
        let realm = try! Realm()
        
        // Add to the Realm inside a transaction
        try! realm.write {
            realm.add(location)
        }
    }
    
    // Delete old (-1 day) objects in a background thread
    fileprivate func deleteOldLocations() {
        DispatchQueue.global().async {
            // Get the default Realm
            let realm = try! Realm()
            
            // Old Locations stored in Realm
            let oldLocations = realm.objects(Location.self).filter(NSPredicate(format:"createdAt < %@", NSDate().addingTimeInterval(-86400)))
            
            // Delete an object with a transaction
            try! realm.write {
                realm.delete(oldLocations)
            }
        }
    }
    
    // Delete all location objects from realm
    fileprivate func deleteAllLocations() {
        // Get the default Realm
        let realm = try! Realm()
        
        // Delete all objects from the realm
        try! realm.write {
            realm.deleteAll()
        }
    }
    
    // Make Location object from CLLocation
    fileprivate func makeLocation(rawLocation: CLLocation) -> Location {
        let location = Location()
        location.latitude = rawLocation.coordinate.latitude
        location.longitude = rawLocation.coordinate.longitude
        location.createdAt = Date()
        return location
    }
    
    // Drop pin on the map
    fileprivate func dropPin(at location: Location) {
        if location.latitude != 0 && location.longitude != 0 {
            let annotation = MKPointAnnotation()
            annotation.coordinate = CLLocationCoordinate2DMake(location.latitude, location.longitude)
            annotation.title = "\(location.latitude),\(location.longitude)"
            annotation.subtitle = location.createdAt.description
            self.mapView.addAnnotation(annotation)
        }
    }
    
    // Remove all pins on the map
    fileprivate func removeAllAnnotations() {
        let annotations = self.mapView.annotations.filter {
            $0 !== self.mapView.userLocation
        }
        self.mapView.removeAnnotations(annotations)
    }
    
    // MARK: - CLLocationManager delegate
    
    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        if status == CLAuthorizationStatus.notDetermined {
            locationManager.requestAlwaysAuthorization()
        }
        else if status == CLAuthorizationStatus.authorizedAlways {
            // Center user location on the map
            let span = MKCoordinateSpanMake(0.003, 0.003)
            let region = MKCoordinateRegionMake(self.mapView.userLocation.coordinate, span)
            self.mapView.setRegion(region, animated:true)
            self.mapView.userTrackingMode = MKUserTrackingMode.followWithHeading
        }
    }
    
    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations:[CLLocation]) {
        guard let newLocation = locations.last else {
            return
        }
        
        if !CLLocationCoordinate2DIsValid(newLocation.coordinate) {
            return
        }
        
        self.addCurrentLocation(newLocation)
        
        let location = makeLocation(rawLocation: newLocation)
        dropPin(at: location)
    }
    
    
    // MARK: - MKMapView delegate
    
    func mapView(_ mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
        
        if annotation is MKUserLocation {
            return nil
        }
        
        let reuseId = "annotationIdentifier"
        
        var pinView = self.mapView.dequeueReusableAnnotationView(withIdentifier: reuseId) as? MKPinAnnotationView
        if pinView == nil {
            pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
            pinView?.canShowCallout = true
            pinView?.animatesDrop = true
        }
        else {
            pinView?.annotation = annotation
        }
        
        return pinView
    }
    
    
    // MARK: - Table view data source
    
    func numberOfSectionsInTableView(_ tableView: UITableView) -> Int {
        // Return the number of sections.
        return 1
    }
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        // Return the number of rows in the section.
        return self.locations.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAtIndexPath indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "CellIdentifier", for: indexPath)
        
        let location = self.locations[indexPath.row]
        cell.textLabel?.text = "\(location.latitude),\(location.longitude)"
        cell.detailTextLabel?.text = location.createdAt.description
        
        return cell
    }
    
    
    // MARK: - Table view delegate
    
    func tableView(_ tableView: UITableView, didSelectRowAtIndexPath indexPath: IndexPath) {
        tableView.deselectRow(at: indexPath, animated: true)
    }
}

###補足情報(言語/FW/ツール等のバージョンなど)
Swift3,Xcode8.3.1,シュミレータでの実装

Answer 1

CellのIdentifierにCellIdentifierを設定しているようですがこちらtypoなどありませんか？

下記の手順で確認してみてください^^/

①Storyboardでcellを選択
②Attribute Inspectorを開く
③Table View CellのIdentifierの部分（下図でCellと入力されてる部分）をチェック

Comments

[TaigaMikami]

回答ありがとうございます。
確認してみると、まさしくCellのIdentifierが設定されていませんでした。
設定した後にデバッグしてみるとできず、、、しかし、CellのスタイルをSubtitleに変更するとできました！！これはどうしてでしょうか？
お時間あれば御教授ください。
本当に回答ありがとうございます。

[jollyjoester]

Cellのスタイルは関係ないはずなので保存できてなかったとかなのかなぁと思います。
もう一度お試しください！