PFObject subclassing and pointers - ios

Question

I have a class UserFeed where I store all the posts. And I have a class UserProfile where I store all the user details(name, age, occupation). Currently I have a pointer to UserProfile. But when I try to set the occupationLabel it gives me nil.
// PostsCollectionViewCell.swift
import UIKit
import DateTools
import Parse
class PostsCollectionViewCell: UICollectionViewCell {
var post: Post! {
didSet {
updateUI()
}
}
#IBOutlet var postLabel: UILabel!
#IBOutlet var genderLabel: UILabel!
#IBOutlet var occupationLabel: UILabel!
#IBOutlet var timeLabel: UILabel!
#IBOutlet var likeButton: UIButton!
func layoutSubview() {
super.layoutSubviews()
}
private func updateUI() {
occupationLabel?.text! = post.userProfile.occupation
timeLabel?.text! = post.createdAt?.shortTimeAgoSinceDate(NSDate()) ?? ""
postLabel?.text! = post.postText
}
#IBAction func likeButtonDidTouch(sender: AnyObject) {
}
}
Post query in my DiscoverViewController
func queryForPosts() {
PFGeoPoint.geoPointForCurrentLocationInBackground { (geopoint, error) in
if !(error != nil) {
if let geoPoint = geopoint {
let query = PFQuery(className: "UserFeed")
query.whereKey("location", nearGeoPoint: geoPoint, withinMiles: 5)
query.addDescendingOrder("createdAt")
query.includeKey("userProfile")
query.findObjectsInBackgroundWithBlock({ (objects, error) -> Void in
if error == nil {
if let postObjects = objects as? [PFObject] {
self.posts.removeAll()
for postObject in postObjects {
let post = postObject as! Post
self.posts.append(post)
}
self.collectionView.reloadData()
}
} else {
print("\(error!.localizedDescription)")
}
})
}
}
}
}
Post subclassing
import UIKit
import Parse
public class Post: PFObject, PFSubclassing{
// MARK: - Public API
#NSManaged public var username: PFUser
#NSManaged public var location: PFGeoPoint?
#NSManaged public var userProfile: String!
#NSManaged public var postText: String!
#NSManaged public var numberOfLikes: Int
#NSManaged public var likedUserIdCollection: [String]!
public func incrementNumberOfLikes() {
numberOfLikes++
self.saveInBackground()
}
//Mark: - Convience init
init(username: PFUser, location: PFGeoPoint?, userProfile: String, postText: String, numberOfLikes: Int) {
super.init()
self.username = username
self.location = location
self.userProfile = userProfile
self.postText = postText
self.numberOfLikes = numberOfLikes
self.likedUserIdCollection = [String]()
}
override init() {
super.init()
}
//MARK: - Like / Dislike
public func like(){
let currentUserObjectId = PFUser.currentUser()!.objectId!
if !likedUserIdCollection.contains(currentUserObjectId) {
numberOfLikes++
likedUserIdCollection.insert(currentUserObjectId, atIndex: 0)
self.saveInBackground()
}
}
public func dislike() {
let currentUserObjectId = PFUser.currentUser()!.objectId!
if likedUserIdCollection.contains(currentUserObjectId) {
numberOfLikes--
for (index, userId) in likedUserIdCollection.enumerate() {
if userId == currentUserObjectId {
likedUserIdCollection.removeAtIndex(index)
break
}
}
self.saveInBackground()
}
}
// MARK: - PFSubClassing
override public class func initialize() {
struct Static {
static var onceToken : dispatch_once_t = 0;
}
dispatch_once(&Static.onceToken) {
self.registerSubclass()
}
}
public static func parseClassName() -> String {
return "UserFeed"
}
}

Answer 1

Object can't store value until it intialize, need to call below init as present in your code
init(username: PFUser, location: PFGeoPoint?, userProfile: String, postText: String, numberOfLikes: Int) {
super.init()
self.username = username
self.location = location
self.userProfile = userProfile
self.postText = postText
self.numberOfLikes = numberOfLikes
self.likedUserIdCollection = [String]()
}

Answer 2

Need to initialize Post object, seems you have not made it.