Images not displayed in collection view cell

Question

I have a collection view cell and inside there's an imageView. On it I display array of images using sd_setImage once loaded from firestore. In console I see all images which my app downloaded.

I use this code:

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return images.count
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "newDetailCollectionCell", for: indexPath) as! NewDetailCollectionViewCell
    cell.imageView.sd_setImage(with: URL(string: images[indexPath.item]))

    return cell
}

When I use this code I can't see my images. But if I use the code below everything works fine.

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return 10
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "newDetailCollectionCell", for: indexPath) as! NewDetailCollectionViewCell
    cell.imageView.sd_setImage(with: URL(string: images[indexPath.item]))

    return cell
}

can you just set break point at numberOfItemsInSection and print "images.count"? — V D Purohit, Jan 12 '18 at 13:07
@VDPurohit if i print `images.count` i see 1 item. But i still have tableView and tableView showed me images.count = 10 — Dima, Jan 12 '18 at 13:20
@KeyurHirani i added code, i think more code does not need to solve the problem — Dima, Jan 12 '18 at 13:26
i see all images in console, but why my images doesn't want to appear? delegate and datasource I did in mainstoryboard — Dima, Jan 12 '18 at 13:29

score 0 · Accepted Answer · edited Jan 12 '18 at 21:43

0

The problem is that you should be calling collectionView.reloadData() instead of tableView.reloadData() in your Dispatch.main.async {} Because in this situation the collectionView needs to update the dataSource. I Hope this helps.

DispatchQueue.main.async {
  self.collectionView?.reloadData()
}

edited Jan 12 '18 at 21:43

FortyTwo

2,414
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answered Jan 12 '18 at 17:41

mrformidable

16

I figured out the problem. What you said didn't help, but it helped me to understand what I have a problem. Thanks. – Dima Jan 13 '18 at 06:23
@Dima do you mind sharing what was your problem? I'm having a similar issue – budiDino Oct 16 '18 at 11:25

Images not displayed in collection view cell

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