CODEWITHSUNDEEP
iosswiftuitableviewcore-datauicollectionview
Sebastian
Sebastian

Reputation: 87

prepareForSegue - CollectionView/TableView

How can I use indexPathForSelectedRow in CollectionView?

CollectionView/TableView:

    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCellWithReuseIdentifier("levelCell", forIndexPath: indexPath) as! CollectionViewCell

    guard levelListen != nil else {
        return cell
    }

    let levelListe = levelListen[indexPath.row]
    cell.levelLabel?.text = levelListe.name

    return cell
}

TableView - prepareForSegue (work):

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

    if segue.identifier == "zumLevel" {
        let dstCtl = segue.destinationViewController as! InLevelViewController

        let indexPath = tableView.indexPathForSelectedRow!
        dstCtl.levelList = levelListen[indexPath.row]
    }
}

CollectionView - prepareForSegue (not work):

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

    if segue.identifier == "zumLevel" {
        let dstCtl = segue.destinationViewController as! InLevelViewController

        // like TableView?
        let indexPath = collectionView.indexPathsForSelectedItems()!
        dstCtl.levelList = levelListen[indexPath.row]  //  <--- .row doesn't work, should I use .count ? 
    }
}

When I try .count it says: "unexpectedly found nil while unwrapping an Optional value"

Upvotes: 1

Views: 509

Answers (1)

Bacon
Bacon

Reputation: 812

collectionView.indexPathsForSelectedItems() returns multiple IndexPath's because you can select multiple cells. This function returns an array of IndexPaths, e.g [NSIndexPath].

It should work if you'd do something like:

let indexPath = collectionView.indexPathsForSelectedItems()

if let lastRowSelected = indexPath?.last?.row {
   dstCtl.levelList = levelListen[lastRowSelected]
}

Upvotes: 0

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