SwiftStarter SwiftStarter - 1 year ago 99
iOS Question

Swift Array not being appended to

I'm trying to get a tableview to display parsed data, but the array that is supposed to be populating my tableview isn't being appended.
Could someone take a quick look and let me know what I'm doing wrong?

import UIKit
import SwiftKeychainWrapper
import Firebase

class FeedVC: UIViewController, UITableViewDelegate, UITableViewDataSource {

@IBOutlet var tableView: UITableView!

var posts = [Post]()

override func viewDidLoad()

tableView.delegate = self
tableView.dataSource = self

DataService.ds.REF_POSTS.observeEventType(.Value, withBlock: { snapshot in
if let snapshot = snapshot.children.allObjects as? [FIRDataSnapshot]
for snap in snapshot

if let postDict = snap.value as? Dictionary<String, AnyObject>
let key = snap.key
let post = Post(postID: key, postData: postDict)




override func viewDidAppear(animated: Bool) {


override func didReceiveMemoryWarning() {
// Dispose of any resources that can be recreated.

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return posts.count
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

let post = posts[indexPath.row]

return tableView.dequeueReusableCellWithIdentifier("PostCell") as! PostCell

@IBAction func signOutBtnTapped(sender: UIButton) {

try! FIRAuth.auth()?.signOut()
performSegueWithIdentifier("toSignInVC", sender: nil)


Thanks guys.

Answer Source

Your data retrieval appears to be an async operation, which probably does not finish before the table is rendered. Try reloading the table data on a new line after self.posts.append(post) or at the end of the completion block.

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