为什么我在尝试为我的 UITableView 获取 UILabel 时不断收到“致命错误”？

Question

I'm a beginner coder and I've hit a seeming impasse. I'm setting up a UITableView to display blog posts from users. I can successfully retrieve information from my Firestore database, but am having trouble actually populating this information into my UITableViewCell . I think this is down to the way my 'PostTableViewCell' is set up. Any answers to this would be immensely appreciated. Here is what I have:

Home View Controller:

 var postArray: [String] = []
var documents: [DocumentSnapshot] = []

let db = Firestore.firestore()
let currentUserID = Auth.auth().currentUser?.uid

    // Find the UserIDs of people following
// Where Field for those UserIDs in "Posts"


override func viewDidLoad() {
    super.viewDidLoad()
    getFollowingPosts()
    configureTableView()
    }

func getFollowingPosts() {
    let searchForFollowing = db.collection("users").document(currentUserID!).collection("Following")
    searchForFollowing.getDocuments { (snapshot, error) in
        for documents in snapshot!.documents {
            let followedUID = documents.get("uid")
            print(followedUID!)
            
            self.db.collection("posts").whereField("uid", isEqualTo: followedUID!).getDocuments { (querySnapshot, error) in
                for documents in querySnapshot!.documents {
                    let uid = documents.get("uid") as! String
                    let title = documents.get("Title") as! String
                    let ProfilePictureURL = documents.get("ProfilePictureURL") as! String
                    let username = documents.get("username") as! String
                    let content = documents.get("Content") as! String
                    self.postArray.append(title)
                    print(self.postArray)
                }
                self.tableView.reloadData()
            }
        }
    }
    }

func configureTableView() {
    tableView.delegate = self
    tableView.dataSource = self
    tableView.register(PostTableViewCell.self, forCellReuseIdentifier: "PostCell")

    // remove separators for empty cells
    tableView.tableFooterView = UIView()
    // remove separators from cells
    tableView.separatorStyle = .none
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    postArray.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "PostCell", for: indexPath) as! PostTableViewCell
    let post = postArray[indexPath.row]
    **cell.titleLabel.text = post** //Error is encountered here
    return cell
}

PostTableViewCell:

class PostTableViewCell: UITableViewCell {

   
    @IBOutlet weak var usernameLabel: UILabel!
    
    @IBOutlet weak var titleLabel: UILabel!
    
    @IBOutlet weak var contentLabel: UILabel!
}

As I said in the title, I keep receiving a 'Fatal Error: unexpectedly found nil while implicitly unwrapping an Optional value" whenever I try to build, leading me to believe something is wrong with my 'PostTableViewCell' - this point is marked with double asterisks in my code. Any information and answers would be massively appreciated. I'm a real beginner, and eager to progress from this standstill.

Answer 1

1. Remove the following statement from your code:

    tableView.register(PostTableViewCell.self, forCellReuseIdentifier: "PostCell")

2. You are missing this function inside PostTableViewCell:

    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }