CODEWITHSUNDEEP
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Lawris
Lawris

Reputation: 1035

"unexpectedly found nil" out of viewDidLoad

I have some outlets in my view and I try to edit them programatically in a function.

Xcode says:

unexpectedly found nil while unwrapping an optional value

However, when I edit outlets in viewDidLoad() just after super.viewDidLoad(), it works like a charm.

With the function :

func test(){
    localDeviceNameView.stringValue = "some stuff" //Found nil here

}

With viewDidLoad :

 override func viewDidLoad() {
    super.viewDidLoad()

    localDeviceNameView.stringValue = "some stuff" //Works well  

}

How can I make it work?

Upvotes: 1

Views: 459

Answers (2)

aimak
aimak

Reputation: 540

You can use didSet on your variable. Like this :

@IBOutlet var localDeviceNameView : UIView! {
  didSet {
    localDeviceNameView.stringValue = "some stuff"
  }
}

What's good with this approach is that you set your stringValue only when the localDeviceNameView is set, which is right when it has been loaded from the NIB/Storyboard.

I think this is exactly what you need.

Upvotes: 3

Artyom Devyatov
Artyom Devyatov

Reputation: 1054

You are trying to call test() before views are completely loaded, so they are not exist yet. Do it this way:

class MyController: UIViewController {
    var something = ""

    override viewDidLoad() {
        super.viewDidLoad()
        localDeviceNameView.stringValue = something
    }
}

Or call you'r test() method only if you sure than all views are loaded (viewDidLoad() was called)

Upvotes: 1

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