UIImage image from URL not being set

Question

I currently have a UICollectionView embed within a UICollectionViewCell, labels within the embbed the embbedViewController work properly but there's a problem with the UIImageView. For some strange reason I'm unable to set images from URL using AlamofireImage or Haneke but works properly when the image is set from a UIImage in Image.xcassetts. Would anyone be able to shed some light as to why this is happening?

embbedCollectionView

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell { let cell = collectionView.dequeueReusableCellWithReuseIdentifier("trendCell", forIndexPath: indexPath) as! customCollectionViewCell let imgUrl = NSURL(fileURLWithPath: mainViewArrayContainer.artImg[indexPath.row]) cell.secondCollectionViewImage.hnk_setImageFromURL(imgUrl) cell.secondCollectionViewLabel.text = mainViewArrayContainer.artImg[indexPath.row] return cell }

ParentViewController

 func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell { if (indexPath.row == 3){ let cell = collectionView.dequeueReusableCellWithReuseIdentifier("trendingCell", forIndexPath: indexPath) as! customCollectionViewCell let controller:EmbbedCollectionViewController = self.storyboard!.instantiateViewControllerWithIdentifier("embbedCollectionView") as! EmbbedCollectionViewController addChildViewController(controller) cell.addSubview(controller.view) return cell } else{ //removed to save space }

Update your question with relevant code.

rmaddy
– rmaddy

2015-11-13 03:41:12 +00:00
Commented Nov 13, 2015 at 3:41 — rmaddy
– rmaddy, Commented Nov 13, 2015 at 3:41

matt · Accepted Answer · 2015-11-13 03:51:58Z

1

For some strange reason I'm unable to set images from URL using AlamofireImage or Haneke

You cannot set the image directly by downloading. You must return the cell now. Downloading takes time. You have to download asynchronously and go back and set the image later.

answered Nov 13, 2015 at 3:51

matt

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3 Comments

MatthewLuiHK Over a year ago

also, when finish fetching images from asynchronous block, remember to ensure you are setting the images in a main queue.

kye Over a year ago

That makes sense, thank you. How can i ensure the images are being set in the main queue? @MatthewLuiHK

MatthewLuiHK Over a year ago

Just force to do it by using : dispatch_sync(dispatch_get_main_queue()) { () -> Void in }

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