Fatal error: nil unexpectedly found while expanding optional value in UITableViewCell

Question

A similar question is asked here , but this does not solve this problem for me. I added tableViewin ViewController. I made an extended class with it dataSource and Delegate and added the necessary methods for it.
Then I made a prototype cell in this table (not a separate .xib for it) and made a class for this TableViewCelland put together @IBOutlet:

    @IBOutlet weak var titleOfAccount: UILabel!
    @IBOutlet weak var lastModified: UILabel!

    @IBOutlet weak var accountImage: UIImageView!
    @IBOutlet weak var cellView: UIView!

Then into cellForRowAtthe table view method when I wrote

cell.titleOfAccount.text = "Hello World"
cell.lastModified.text = "Last Modified: 21 May 2017"

and executed the code that he encountered this error.

fatal error: nil unexpectedly found while deploying optional value

, TableViewCell ! ? cellForRowAt :

 cell.titleOfAccount?.text = "Hello World"
 cell.lastModified?.text = "Last Modified: 21 May 2017"

, , , tableView , :

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 3;
    }

cellForRowAt:

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        let cell: AccountsTableViewCell = self.tableView.dequeueReusableCell(withIdentifier: cellReuseIdentifier) as! AccountsTableViewCell

        cell.backgroundColor = UIColor.clear
        cell.clipsToBounds = true

        cell.cellView.layer.shadowColor = UIColor.black.cgColor
        cell.cellView.layer.shadowOpacity = 1
        cell.cellView.layer.shadowOffset = CGSize.zero
        cell.cellView.layer.shadowRadius = 10

        cell.titleOfAccount.text = "Hello World"
        cell.lastModified.text = "Last Modified: 21 May 2017"
        cell.accountImage.image = UIImage(named: "fb")

        return cell
    }

P.S. self.tableView.register(AccountsTableViewCell.self, forCellReuseIdentifier: cellReuseIdentifier) viewDidLoad

Answer 1

viewDidLoad() (), .

self.tableView.register(AccountsTableViewCell.self, forCellReuseIdentifier: cellReuseIdentifier)

( ).

Answer 2

 func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 
          let cell = tableView.dequeueReusableCell(withIdentifier: "yourcellidentifier", for: indexPath) as! AccountsTableViewCell
          // add your code
    }