fatal error: unexpectedly found nil while unwrapping an Optional value [duplicate]

Answer 1

That means your storyboard doesn't have a link to your IBOUTLET, please verify

Answer 2

some times the problem that you have initiate view controller before present it like this:

let myViewController  = MyViewController()

replace that by

let  myViewController = self.storyboard?.instantiateViewController(withIdentifier: "storyboardID") as! MyViewController

Answer 3

I had the exact same error and spent quiet an amount of time debugging it. What @jmduke said is really the key: where does the error occur?

With my particular error, looking at operaterLabel.text == "" led me on the right path. I accessed the operaterLabel.text while the view was not yet fully initialized. In my particular case I set a variable from a different view during a segue and then acted upon that variable being set and updating a label inside the view. However the view was not completely initialized.

Thus my solution was to update the label inside the viewDidLoad() function.

Answer 4

If you make sure the xib for your cell is no problem,

Then I occur this issue, my error was register the cell method :

1)

self.tableView.register(TerantInfoTabCell.self, forCellReuseIdentifier: "TerantInfoTabCell")

2)

self.tableView.register(UINib(nibName:"TerantInfoTabCell", bundle: nil), forCellReuseIdentifier: "TerantInfoTabCell")

I use the first method, there will appear the issue,then I use the 2) method replace the 1) , so there is no problem here.

Answer 5

I searched and searched trying to figure out how to solve my similar problem. As others mentioned, I was accessing UI elements before they were initialized. But figuring out why, was the difficult part. Spoiler --> I was using ProfileVC.swift and profileVC.xib

Even though I had all of my connections right in IB, from the parentVC I was calling

let newVC = ProfileVC()
profile.modalPresentationStyle = .custom
present(profile, animated: true, completion:nil)

Since I had different names (caplital 'P' in my swift file and lowercase 'p' in my xib), calling ProfileVC() didn't work as it didn't know to go to the xib I had made. Instead I had to use:

let newVC = ProfileVC.init(nibName: "profileVC", bundle: Bundle.main)

or just rename the xib to have a captial P and I could use my original code

Obviously this is hard to see in stackoverflow as you need to see what you are calling in the parent VC, the names of the files and IB. So hopefully this may be one solution to someone's problem out there even if it doesn't solve Arshia's problem.