Displaying Firebase data in a tableview - swift

Question

I am trying to retrieve information stored in a Firebase Database, but my tableview is not displaying the information. I have tried using print functions to see if the data is being retrieved, and it shows that this is the case, but the tableview shows up as blank when I run the simulator.
I am using Xcode 11 and every tutorial that I have looked at is not working for some reason.
Here is my code:
import UIKit
import Firebase
import FirebaseDatabase
import SwiftKeychainWrapper
import FirebaseAuth
class FeedVC: UITableViewController {
var currentUserImageUrl: String!
var posts = [postStruct]()
var selectedPost: Post!
override func viewDidLoad() {
super.viewDidLoad()
getUsersData()
getPosts()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func getUsersData(){
guard let userID = Auth.auth().currentUser?.uid else { return }
Database.database().reference().child("users").child(userID).observeSingleEvent(of: .value) { (snapshot) in
if let postDict = snapshot.value as? [String : AnyObject] {
self.tableView.reloadData()
}
}
}
struct postStruct {
let firstName : String!
let lastName : String!
}
func getPosts() {
let databaseRef = Database.database().reference()
databaseRef.child("profiles").queryOrderedByKey().observeSingleEvent(of: .childAdded, with: {
snapshot in
let firstName = (snapshot.value as? NSDictionary)!["profileForename"] as? String
let lastName = (snapshot.value as? NSDictionary
)!["profileSurname"] as? String
print(firstName)
self.posts.append(postStruct(firstName: firstName, lastName: lastName))
print(self.posts)
DispatchQueue.main.async {
self.tableView.reloadData()
}
})
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return posts.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "PostCell") as? PostCell else { return UITableViewCell() }
let nameLabel = cell.viewWithTag(1) as! UILabel
nameLabel.text = posts[indexPath.row].firstName
return cell
}
}
Any help would be much appreciated!

Answer 1

Update: Since PostCell is created in the storyboard within the table view it's registered and dequeued successfully. So the issue is being narrowed down to the label with tag 1. Try creating an #IBOutlet for the label and use that to set the text of UILabel.
Then in cellForRowAt:
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "PostCell") as? PostCell else { return UITableViewCell() }
cell.firstNameLabel.text = posts[indexPath.row].firstName
return cell
}
Previous: You seem to have forgotten to register the PostCell.
override func viewDidLoad() {
super.viewDidLoad()
//...
tableView.register(PostCell.self, forCellReuseIdentifier: "PostCell")
}
Note: If you've created PostCell in Xib use nib registry method.
Update: If you want to register with Nib method use:
tableView.register(UINib(nibName: <#T##String#>, bundle: nil), forCellReuseIdentifier: "PostCell") // provide the xib file name at the placeholder