tableView(_:viewForHeaderInSection:) delegate method cannot be used

[combinecommunity]

tableView(_:viewForHeaderInSection:) delegate method cannot be used

[BestiOSDev]

代理 和 pulisher 只能使用其中的一个. 使用了 publisher 之前scroller.delegate 被重新赋值

[markst]

We had a similar trouble with needing to use indexPathForPreferredFocusedView.
Our solution:

class CollectionView: UICollectionView {
  
  // Subclass of `UICollectionView` provides ability to provide a index path for preferred focus closure.
  // Since we're using `CombineCocoa` we lose the ability to use `UICollectionViewDelegate.indexPathForPreferredFocusedView`
  
  var indexPathForPreferredFocused: (() -> IndexPath?)?
  
  override var preferredFocusEnvironments: [UIFocusEnvironment] {
    let indexPath = indexPathForPreferredFocused?()
    let cell = indexPath.map { self.cellForItem(at: $0) }
    return cell?.map { [$0] } ?? super.preferredFocusEnvironments
  }
}