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UIImageView not updating with new image in UICollectionViewCell on iOS 17

👀 Views: 376 💬 Answers: 1 📅 Created: 2025-07-02
ios swift uicollectionview uimageview Swift

I'm updating my dependencies and I'm stuck on something that should probably be simple. I'm sure I'm missing something obvious here, but I'm stuck on something that should probably be simple... I'm facing an issue where my `UIImageView` inside a `UICollectionViewCell` is not updating when I try to set a new image after the cell has been displayed on the screen. I have a `UICollectionView` that displays images fetched from a remote server. The issue arises when I scroll and the cells are reused; some images do not get displayed as expected even though the data source is updated correctly. Here’s how I’m managing the cell configuration: ```swift class MyCollectionViewCell: UICollectionViewCell { @IBOutlet weak var myImageView: UIImageView! func configure(with image: UIImage?) { myImageView.image = image } } ``` In my `UICollectionViewDataSource`, I'm using this snippet: ```swift func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "MyCell", for: indexPath) as! MyCollectionViewCell let image = images[indexPath.item] // images is an array of UIImage cell.configure(with: image) return cell } ``` However, despite the `configure` function being called, the `UIImageView` sometimes remains blank or shows the previous image. I’ve tried setting `myImageView.image = nil` before assigning the new image, but it doesn’t seem to help. I also ensured that the `images` array is being updated on the main thread after the images are fetched. The strange part is that this only happens intermittently and mostly on older devices. I’ve also tried calling `collectionView.reloadData()` after updating the images, but that results in a noticeable flicker. Is there a more reliable way to ensure the `UIImageView` always displays the correct image without flickering, especially given that cells are reused? Any advice would be appreciated! I'm working on a API that needs to handle this. What's the best practice here? This is part of a larger service I'm building. This is part of a larger service I'm building. Is there a better approach? I'm coming from a different tech stack and learning Swift. Any ideas how to fix this?