Unable to display multiple UICollectionViewCells with Swift

Question

I am unable to display the second cell despite registering it to the collectionView. Does anyone know why this is the case? The cell exists as when I switch the row the other cell displays instead.

class ViewController: UICollectionViewController, UICollectionViewDelegateFlowLayout {


    override func viewDidLoad() {
        super.viewDidLoad()

        collectionView?.backgroundColor = UIColor.white


        collectionView?.register(HeaderCell.self, forCellWithReuseIdentifier: "HeaderCell")
        collectionView?.register(SummaryCell.self, forCellWithReuseIdentifier: "SummaryCell")


    }

    override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        if section == 0 {
            return 1
        }
        return 1
    }

    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

        if (indexPath.row == 0) {

            let cell1 = collectionView.dequeueReusableCell(withReuseIdentifier: "HeaderCell", for: indexPath) as! HeaderCell

            return cell1

        } else {
            let cell2 = collectionView.dequeueReusableCell(withReuseIdentifier: "SummaryCell", for: indexPath) as! SummaryCell

            return cell2
        }

    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {

        return CGSize(width: view.frame.width, height: 200)

    }

}

I have looked a this but still unable to get it to work.

P.S. I am programming everything programmatically.

how many cells in your collection view? you have __1__, therefore the `HeaderCell` will appear only. — holex, Nov 10 '17 at 14:39
@Chace The cell exists as when I switch the row the other cell displays instead.Can you explain your point? — Tushar Sharma, Nov 10 '17 at 14:40
@Chace, I see __1__ cell only, where is the second one or more? — holex, Nov 10 '17 at 14:40
@TusharSharma, correct, I have added numberOfSection and returned 2 but I am just getting a repeat of the first cell. Also, I have two cells no? `HeaderCell` and `SummaryCell` — Chace, Nov 10 '17 at 14:43

score 4 · Answer 1 · answered Nov 10 '17 at 14:44

4

You have registered 2 cells but you are returning only 1 row.Try returning 2 items.

//numberOfItemsInSection
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int{
        return 2
    }

answered Nov 10 '17 at 14:44

Tushar Sharma

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Chace · Answer 2 · 2017-11-10T14:59:22.573

None of the answer correctly/completely solves the issue. However I did use some of the suggestions to get it to work properly by adding the following:

override func numberOfSections(in collectionView: UICollectionView) -> Int {
    return 2
}

And changing indexPath.row to indexPath.section

override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    if (indexPath.section == 0) {

        let cell1 = collectionView.dequeueReusableCell(withReuseIdentifier: "HeaderCell", for: indexPath) as! HeaderCell

        return cell1

    } else {
        let cell2 = collectionView.dequeueReusableCell(withReuseIdentifier: "SummaryCell", for: indexPath) as! SummaryCell

        return cell2
    }
}

Note that you don't need the trailing else statement – oyvindhauge Nov 10 '17 at 15:06 — oyvindhauge, Nov 10 '17 at 15:06

Unable to display multiple UICollectionViewCells with Swift

2 Answers2