👀 Views: 469 💬 Answers: 1 📅 Created: 2025-06-22

ios swift uicollectionview Swift

I've encountered a strange issue with I'm encountering an issue with the selection state of `UICollectionViewCell` after reloading the collection view's data... The app is built using Swift and UIKit, and I'm using a `UICollectionView` to display a grid of items. When I select a cell and then call `collectionView.reloadData()` to refresh the items, the previously selected cell appears to be deselected despite my expectation that it should remain selected. Here's the relevant code snippet for the selection and reload: ```swift class MyViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource { @IBOutlet weak var collectionView: UICollectionView! var selectedIndexPath: IndexPath? func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) { selectedIndexPath = indexPath collectionView.reloadItems(at: [indexPath]) } func reloadData() { collectionView.reloadData() if let selectedIndexPath = selectedIndexPath { collectionView.selectItem(at: selectedIndexPath, animated: false, scrollPosition: .none) } } } ``` In the `didSelectItemAt` method, I store the selected index path, then reload that specific cell. However, when I call `reloadData()`, it seems to reset the selection state of all cells, including the one I tried to keep selected. I tried using `reloadItems(at:)` instead of `reloadData()`, but it doesn't work as expected when the entire dataset is updated, as it leads to inconsistent states in the UI. Additionally, I'm seeing a warning in the console: `UICollectionView: cell is being dequeued when not visible - this may lead to unexpected behavior`. I've checked that all data sources and delegates are set correctly, and the number of items returned in `collectionView(_:numberOfItemsInSection:)` is accurate. Is there a best practice or a different approach to maintain the selection state of a `UICollectionViewCell` across data reloads? Any guidance or sample code would be appreciated. I'm working in a Debian environment. Any examples would be super helpful.