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I'm trying to implement additional UICollectionViewCell's state using UIConfigurationStateCustomKey.
I've already read this post regarding practices for managing custom properties with cells configurations
Seems like I can implement custom state for a UICollectionView's cell.
Here is my implementation of additional state
protocol CustomTypesAccessable: AnyObject {
var isMoving: Bool { get set }
}
extension UIConfigurationStateCustomKey {
static let isMoving = UIConfigurationStateCustomKey("com.myApp.cell.isMoving")
}
extension UICellConfigurationState {
var isMoving: Bool {
get { self[.isMoving] as? Bool ?? false }
set { self[.isMoving] = newValue }
}
}
extension BaseBlockView: CustomTypesAccessable {
var isMoving: Bool {
get {
currentConfiguration.currentConfigurationState?.isMoving ?? false
}
set {
currentConfiguration.currentConfigurationState?.isMoving = newValue
}
}
}
My BaseBlockView class:
class BaseBlockView<Configuration: BlockConfigurationProtocol>: UIView, UIContentView {
var configuration: UIContentConfiguration {
get { currentConfiguration }
set {
guard let newConfiguration = newValue as? Configuration,
currentConfiguration != newConfiguration else { return }
currentConfiguration = newConfiguration
}
}
var currentConfiguration: Configuration {
didSet {
guard didSetupSubviews else { return }
update(with: currentConfiguration)
}
}
I want to update this state from my view controller in the same way CollectionView can make cell selected
- (void)selectItemAtIndexPath:(nullable NSIndexPath *)indexPath animated:(BOOL)animated scrollPosition:(UICollectionViewScrollPosition)scrollPosition;
So I'm trying to change isMoving value this way:
let cell = cellForItem(at: indexPath)
let contentView = cell?.contentView as? CustomTypesAccessable
contentView?.isMoving = isMoving
Everything works fine in that case, but after reusing cell UICellConfigurationState's isMoving property changes back to false.
Is it a UIKit bug?
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