how to reload tableview automatically - ios

Question

Hi I am doing a post screen where users add post and view them.This is the viewcontroller for viewing. I am getting information from firebase and reload that info to my table view cells everything is going perfect. However to reload the screen and see if my posts are up to date I need to close the application and run it again each time although I use .reloadData() function and it doesn't reload automatically after each posting. here is my code where do I do the mistake? or am I missing something?
override func viewDidLoad() {
super.viewDidLoad()
self.navcik.title = "Posts"
tableView = UITableView(frame:view.bounds, style: .plain)
view.addSubview(tableView)
let cellnib = UINib(nibName: "postTableCell", bundle: nil)
tableView.register(cellnib, forCellReuseIdentifier: "postCell")
tableView.delegate = self
tableView.dataSource = self
tableView.reloadData()
observeposts()
}
func observeposts() {
let db = Firestore.firestore()
db.collection("posts").getDocuments { (snap, error) in
var tempposts = [Post]()
if error != nil {
print("error:\(String(describing: error))")
} else {
for document in snap!.documents {
if let dict = document.data() as? [String: Any] ,
let username = dict["username"] as? String,
let title = dict["title"] as? String,
let desc = dict["desc"] as? String {
let post = Post(id: "1", username: username, title: title, desc: desc)
tempposts.append(post)
}
}
self.posts = tempposts
self.tableView.reloadData()
}
}
}
#IBOutlet weak var navcik: UINavigationItem!
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return posts.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "postCell", for: indexPath) as! postTableCell
cell.set(post: posts[indexPath.row])
return cell
}

Answer 1

Well I just added a refresher and observed the posts there and reloaded, works perfect now.

Answer 2

try this
for document in snap!.documents {
if let dict = document.data() as? [String: Any] ,
let username = dict["username"] as? String,
let title = dict["title"] as? String,
let desc = dict["desc"] as? String {
let post = Post(id: "1", username: username, title: title, desc: desc)
tempposts.append(post)
}
tableView.reloadData()
}