You need to specify a parseClassName for the PFQueryTableViewController - xcode

Question

I created a tableViewcontroller and assigned it the custom class: PFQueryTableViewController in story board. I then also gave it the parseClassName "userMessage" and for some reason when i try to run the application I always get the same error message: NSInternalInconsistencyException', reason: 'You need to specify a parseClassName for the PFQueryTableViewController.
I dont understand why I am getting this error because I explicitly gave the class a parseClassName.
Here is my associated code for the PFQueryTabletableViewController:
import UIKit
import CoreLocation
import Parse
class TableViewController: PFQueryTableViewController, CLLocationManagerDelegate {
let userMessages = ["blah blahh blahhh", "Beep Beep Boop", "Beep Beep Bobbity boop"]
let locationManager = CLLocationManager()
var currLocation: CLLocationCoordinate2D?
override init!(style: UITableViewStyle, className: String!) {
super.init(style: style, className: className)
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.parseClassName = "userMessage"
self.textKey = "text"
self.pullToRefreshEnabled = true
self.objectsPerPage = 40
}
private func alert(message: String){
let alert = UIAlertController(title: "Uh-OH", message: message, preferredStyle: UIAlertControllerStyle.Alert)
let action = UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil)
let cancel = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: nil)
let settings = UIAlertAction(title: "Settings", style: UIAlertActionStyle.Default) {(action) -> Void in
UIApplication.sharedApplication().openURL(NSURL(string: UIApplicationOpenSettingsURLString)!)
return
}
alert.addAction(settings)
alert.addAction(action)
self.presentViewController(alert, animated: true, completion: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.estimatedRowHeight = 120
self.tableView.rowHeight = 120
locationManager.desiredAccuracy = 100
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
alert("Cannot fetch your location!!")
}
override func queryForTable() -> PFQuery! {
let query = PFQuery(className: "Messages")
if let queryLoc = currLocation {
query.whereKey("location", nearGeoPoint: PFGeoPoint(latitude: queryLoc.latitude, longitude: queryLoc.longitude), withinMiles: 1)
query.limit = 40
query.orderByDescending("createdAt")
}else {
query.whereKey("location", nearGeoPoint: PFGeoPoint(latitude: 37.41182, longitude: -121.941125), withinMiles: 1)
query.limit = 40
query.orderByDescending("createdAt")
}
return query
}
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
locationManager.stopUpdatingLocation()
if(locations.count > 0) {
let location = locations[0] as CLLocation
println(location.coordinate)
currLocation = location.coordinate
} else {
alert("Cannot fetch your loation")
}
}
override func objectAtIndexPath(indexPath: NSIndexPath!) -> PFObject! {
var obj : PFObject? = nil
if(indexPath.row < self.objects.count) {
obj = self.objects[indexPath.row] as? PFObject
}
return obj
}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return userMessages.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath!, object: PFObject!) -> PFTableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as TableViewCell
cell.messageText.text = object.valueForKey("text") as? String
cell.messageText.numberOfLines = 0
let views = object.valueForKey("count") as Int
cell.numberOfViewsLabel.text = "\(views)"
cell.numberOfViewsLabel.text = "\((indexPath.row + 1) * 5)"
return cell
}
func addToViews(sender: AnyObject) {
let hitPoint = sender.convertPoint(CGPointZero, toView: self.tableView)
let hitIndex = self.tableView.indexPathForRowAtPoint(hitPoint)
let object = objectAtIndexPath(hitIndex)
object.incrementKey("count")
object.saveInBackgroundWithBlock { (Bool, NSError) -> Void in
//blahhh
}
self.tableView.reloadData()
}
}
`

Answer 1

parseClassName is a readonly variable and is only used when subclassing PFObject.
https://parse.com/docs/ios/api/Classes/PFObject.html#//api/name/parseClassName
The class name of the object.
#property (strong, readonly) NSString *parseClassName
Declared In
PFObject.h
Obj-C
#implementation MYGame
#dynamic title;
+ (NSString *)parseClassName {
return #"Game";
}
#end
Swift
class MYGame: PFObject {
class func parseClassName() -> String! {
return "Game"
}
}

Answer 2

In my case I had used a storyboard and needed to create an initWithCoder: method in my PFQueryTableViewController subclass. The template pointed to in the Parse.com docs lacks this method, but the first comment following the example does include an example implementation: https://gist.github.com/jamesyu/ba03c1a550f14f88f95d#gistcomment-74202
The message "You need to specify a parseClassName for the PFQueryTableViewController" is being generated because none of the methods are setting the PFQueryTableViewController's parseClassName property. You'll note that the property is defined quite plainly in the initWithStyle: method example provided in the docs. But, that method won't be called if the view is loaded via a storyboard: for that you'll need to set parseClassName in the initWithCoder: method.
Also, don't confuse subclassing a PFQueryTableViewController for a PFObject. For a PFObject you need to create a class method called parseClassName and also register the subclass before calling [Parse setApplicationId:aid clientKey:ckey]. You don't do those things for a PFQueryTableViewController or any of the other ParseUI view controllers. They rely on one or more of the init methods.