TableView is not updating properly after logout and log in - ios

Question

I have a ProfileView controller where I display the email of the user that is logged in. When I sign out and sign in again the email is updated but the tableview is not updated when new info. Even if it is done the reloading is just appending duplicating rows to the view. Below is my code. Can someone check what I may be doing wrong
import UIKit
import FirebaseAuth
import SDWebImage
import FirebaseDatabase
final class ProfileViewController: UIViewController {
#IBOutlet var tableView: UITableView!
var data = [ProfileViewModel]()
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
guard let email = Auth.auth().currentUser?.email! else {
return
}
tableView.register(ProfileTableViewCell.self,
forCellReuseIdentifier: ProfileTableViewCell.identifier)
data.append(ProfileViewModel(viewModelType: .info,
title: "Email: \(email ?? "No Email")",
handler: nil))
tableView.register(UITableViewCell.self,
forCellReuseIdentifier: "cell")
tableView.delegate = self
tableView.dataSource = self
tableView.tableHeaderView = createTableHeader()
}
func createTableHeader() -> UIView? {
guard let email = UserDefaults.standard.value(forKey: "email") as? String else {
return nil
}
let safeEmail = DatabaseManager.safeEmail(emailAddress: email)
let filename = safeEmail + "_profile_picture.png"
let path = "images/"+filename
let headerView = UIView(frame: CGRect(x: 0,
y: 0,
width: self.view.width,
height: 300))
headerView.backgroundColor = .link
let imageView = UIImageView(frame: CGRect(x: (headerView.width-150) / 2,
y: 75,
width: 150,
height: 150))
imageView.contentMode = .scaleAspectFill
imageView.backgroundColor = .white
imageView.layer.borderColor = UIColor.white.cgColor
imageView.layer.borderWidth = 3
imageView.layer.masksToBounds = true
imageView.layer.cornerRadius = imageView.width/2
headerView.addSubview(imageView)
StorageManager.shared.downloadURL(for: path, completion: { result in
switch result {
case .success(let url):
imageView.sd_setImage(with: url, completed: nil)
case .failure(let error):
print("Failed to get download url: \(error)")
}
})
return headerView
}
}
extension ProfileViewController: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let viewModel = data[indexPath.row]
let cell = tableView.dequeueReusableCell(withIdentifier: ProfileTableViewCell.identifier,
for: indexPath) as! ProfileTableViewCell
cell.setUp(with: viewModel)
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
data[indexPath.row].handler?()
}
}
class ProfileTableViewCell: UITableViewCell {
static let identifier = "ProfileTableViewCell"
public func setUp(with viewModel: ProfileViewModel) {
self.textLabel?.text = viewModel.title
switch viewModel.viewModelType {
case .info:
textLabel?.textAlignment = .center
selectionStyle = .none
}
}
}

Answer 1

I think you need to empty data array before appending new object into that array.
just write
data.removeAll() before
data.append(ProfileViewModel(viewModelType: .info, title: "Email: \(email ?? "No Email")", handler: nil)).
I think this will resolve your issue.