Crash: Can only call -[PFObject init] on subclasses conforming to PFSubclassing - swift

Question

Hello I am learning Swift and I am trying to implement Parse into my app. So I have one MapView which has some annotations. Those annotation are drawn from coordinate stored in Parse database. Each coordinate tuple in Parse has come other details too like FirstName LastName and all. Now Once the user click on the DETAILS button which is present in the mapView. It takes user to a table view controller where user sees all the details pertaining to the coordinates that were visible in the mapView. Till now everything works fine. So If I have 4 annotations in map view. Then By clicking on DETAILS I am redirected to the Table view controller where I can see the details pertaining to all the coordinate/annotations present in the mapView. Now I want a functionality where user can click on the table view controller cell and I can pass on the data to another view pertaining to that particular cell. SO if in the table view controller user click on 4th cell which is belonging to one of the annotation displayed on the map view. I want that 4th cell detail to be passed to another view controller.
map view (with multiple annotations) -> tableview controller (with multiple cells) -> view controller (pertaining to the cell the user clicked).
Problem: As soon as I click on any of the cell in table view controller so that I can see that cell's detail in another view controller My app crashes and I see error as
2015-11-30 21:38:42.998 LifeLine[53788:6661072] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Can only call -[PFObject init] on subclasses conforming to PFSubclassing.'
I have put breakpoint AT PREPAREFORSEGUE METHOD in table view controller. But even before the prepareforsegue method breakpoints hits my app is already crashed. So the crash happens between -- my click on the cell and the hitting of breakpoint on prepareforsegue.
My MapViewController:
import UIKit
import MapKit
import MessageUI
class MultipleAnnotationViewController: UIViewController, MKMapViewDelegate, MFMailComposeViewControllerDelegate
{
var arrayOfPFObject: [PFObject] = [PFObject]()
var lat_ :Double = 0
var long_ :Double = 0
#IBOutlet weak var dispAnnotation: MKMapView!
let currentUser = PFUser.currentUser()
var pinAnnotationView:MKPinAnnotationView!
override func viewDidLoad()
{
super.viewDidLoad()
dispAnnotation.delegate = self
for coordinateItem in arrayOfPFObject
{
let pointAnnotation = MKPointAnnotation()
self.lat_ = coordinateItem["Latitude"] as! Double
self.long_ = coordinateItem["Longitude"] as! Double
pointAnnotation.coordinate = CLLocationCoordinate2D(latitude: self.lat_, longitude: self.long_)
dispAnnotation.addAnnotation(pointAnnotation)
pointAnnotation.title = String(coordinateItem["FirstName"]) + " " + String(coordinateItem["LastName"])
let miles = 10.0
let scalingFactor = abs(( cos ( 2*M_PI*pointAnnotation.coordinate.latitude/360.0 ) ) )
var span = MKCoordinateSpan(latitudeDelta: 0, longitudeDelta: 0)
span.latitudeDelta = miles/69.0
span.longitudeDelta = miles/(scalingFactor * 69.0)
let region = MKCoordinateRegionMake(pointAnnotation.coordinate, span)
[ self.dispAnnotation.setRegion(region, animated: true)]
}
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?)
{
if segue.identifier == "TableView"
{
let controller = segue.destinationViewController as! TableViewController
controller.arrayOfPFObject = arrayOfPFObject
}
if segue.identifier == "TableView2"
{
let controller = segue.destinationViewController as! ChecklistViewController
controller.arrayOfPFObject = arrayOfPFObject
}
}
func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView?
{
guard !(annotation is MKUserLocation)
else
{
return nil }
let identifier = "com.domain.app.something"
var annotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(identifier) as? MKPinAnnotationView
if annotationView == nil
{
annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
annotationView?.pinTintColor = UIColor.redColor()
annotationView?.canShowCallout = true
}
else
{
annotationView?.annotation = annotation
}
return annotationView
}
}
My TableViewController:
import UIKit
class ChecklistViewController: UITableViewController
{
override func viewDidLoad() {
super.viewDidLoad()
}
var arrayOfPFObject: [PFObject] = [PFObject]()
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
return arrayOfPFObject.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCellWithIdentifier(
"ChecklistItem", forIndexPath: indexPath)
let label = cell.viewWithTag(1000) as! UILabel
print(arrayOfPFObject.count)
print(indexPath.row)
let coordinateItem = arrayOfPFObject[indexPath.row]
label.text = String(coordinateItem["Address"])
return cell
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?)
{
if segue.identifier == "call"
{
let controller = segue.destinationViewController as! CallEmailViewController
if let indexPath = tableView.indexPathForCell( sender as! UITableViewCell)
{
controller.itemToEdit = arrayOfPFObject[indexPath.row]
}
}
}
}
My View Controller which I where I want to show detail of clicked Cell.
import UIKit
import CoreLocation
import MapKit
class CallEmailViewController: UITableViewController
{
var itemToEdit: PFObject = PFObject()
override func viewDidLoad()
{
super.viewDidLoad()
mail() //print(arrayOfPFObject.count)
}
func mail()
{
print("")
}
}
Below is table view image. As soon as I click on any of the table view I get the error.

Answer 1

Change var itemToEdit: PFObject = PFObject() to
var itemToEdit: PFObject?