Referencing IBOutlet causes crash

Question

I have an UIImageView outlet set up as below:

@IBOutlet weak var imageView: UIImageView!

And then have some logic that changes the image if a certain value is matched:

if(someValue == "1"){
   imageView.image = UIImage(named:"image1")
}else if(someValue == "2"){
   imageView.image = UIImage(named:"image2")
}

When this is executed, I got the following error:

Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value

Once you checked that the "round is full" on the left of the `@IBOutlet` declaration, tell us how your UIViewController (or whatever the class is) is initialized. — Larme, Mar 18 '19 at 14:42

Francesco Puglisi · Answer 1 · 2019-03-18T12:26:15.290

5

Ensure that the outlet is correctly set up. The outlet will have a filled circle on its left if it is connected to a view in a storyboard, otherwise you'll see an empty circle. If you have an empty circle, you can either click and drag to the view you want to connect the outlet to or delete it and recreate it.

edited Mar 18 '19 at 12:26

answered Mar 18 '19 at 12:11

Francesco Puglisi

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score 0 · Accepted Answer · answered Mar 18 '19 at 12:08

0

The outlet was referenced in the .swift file, however, wasn't properly connected. Removing this reference and reconnecting resolved this.

answered Mar 18 '19 at 12:08

peterbonar

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Referencing IBOutlet causes crash

2 Answers2