"func prepareForSegue" not calling for CollectionView

Question

Is It possible to use shouldPerformSegueWithIdentifier to catch the movement of segue with following method:

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?){
}

Here is my view controller code :

func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
    let poke:Pokemon!

    if inSearchMode {
        poke=filterPokemons[indexPath.row]
    } else {
        poke=pokemonlist[indexPath.row]
    }
    shouldPerformSegueWithIdentifier("PokemonDetailVC", sender: poke);
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "PokemonDetailVC" {
        if let detailVC = segue.destinationViewController as? PokemonDetailVC{
            if let poke = sender as? Pokemon {
                detailVC.pokemon=poke;
            }
        }
    }
}

Storyboard segue reference

score 2 · Accepted Answer · edited May 23 '17 at 12:15

2

Try:

performSegueWithIdentifier("Identifier", sender: self)

Instead of:

shouldPerformSegueWithIdentifier("Identifier", sender: self)

When we use shouldPerformSegueWithIdentifier we can catch the movement of segue with following method:

override func shouldPerformSegueWithIdentifier(identifier: String, sender: AnyObject?) -> Bool

Check this link: Prevent segue in prepareForSegue method?

edited May 23 '17 at 12:15

Community

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answered Sep 03 '16 at 04:11

Bista

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No `sender` is okay, just change the method to `performSegueWithIdentifier .` – Bista Sep 03 '16 at 04:17

Nirav D · Answer 2 · 2016-09-03T04:57:45.617

You need to call performSegueWithIdentifier instead of shouldPerformSegueWithIdentifier because shouldPerformSegueWithIdentifier method gives you an opportunity to prevent a segue from happening. Returning NO from this method causes the segue to fail to perform.

If you want more detail about shouldPerformSegueWithIdentifier check this apple documentation

Where as performSegueWithIdentifier method allows to pass data from the source view controller to the destination view controller.

So now just call performSegueWithIdentifier like this instead of shouldPerformSegueWithIdentifier.

performSegueWithIdentifier("PokemonDetailVC", sender: poke)

In Swift 3.0

self.performSegue(withIdentifier: "PokemonDetailVC", sender: poke)

"func prepareForSegue" not calling for CollectionView

2 Answers2