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Mido Hitman
Mido Hitman

Reputation: 3

Using storyboard?.instantiate returns "Unexpectedly found nil" error

I am getting an error when I use storyboard?.instantiate. It's giving me this error:

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

and this is my code:

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    let vc = storyboard?.instantiateViewController(withIdentifier: "SelectedViewController") 
             as? SelectedViewController
    vc?.name = imgArr[indexPath.row]
    self.navigationController?.pushViewController(vc!, animated: true)
}

and I am already using the identifier ID in this photo:

go to the photo from here

Please anyone can help me in this issue.

Upvotes: 0

Views: 719

Answers (3)

Gaya3
Gaya3

Reputation: 55

try this below code: 

let storyBoard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let vcTitles =  storyBoard.instantiateViewController(withIdentifier: "vcTitles") as! VCTitlesViewController
self.navigationController?.pushViewController(vcTitles, animated: true)

Upvotes: 0

Alastar
Alastar

Reputation: 1374

is SelectedViewController in the same storyboard of the collection view's view controller?

I always prefer to unwrap optionals with a guard or if let to avoid crashes like this. You can use:

   guard let viewController = storyboard?.instantiateViewController(withIdentifier: "SelectedViewController") as? SelectedViewController else { "return error here if wanted" return }
    viewController.name = imgArr[indexPath.row]
    self.navigationController?.pushViewController(viewController, animated: true)

Upvotes: 0

Shehata Gamal
Shehata Gamal

Reputation: 100503

Move the mouse over the class field in IB , then click enter , module check must be ticked , and verify you correctly set storyboard identifier

enter image description here

Upvotes: 1

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