触摸时缩小 UICollectionViewCell - delaysContentTouches 问题

Question

I have a scrollView, which contains modules with collectionView and modules with tableView. So you can scroll up and down with scrollView, and scroll right and left in collectionView modules. After pressing on collectionView cell, user is navigated to another view controller.

here is an approximate sketch of how the UI looks like

I need to make cells in collectionView shrink on touch. The problem is, that when I try to do this - I have a slight delay between touch and the start of shrinking. I am using this code to make the cell shrink:

 func collectionView(_ collectionView: UICollectionView, didHighlightItemAt indexPath: IndexPath) {
    if let cell = collectionView.cellForItem(at: indexPath) {
        UIView.animate(withDuration: 0.1) {
            cell.transform = CGAffineTransform(scaleX: 0.95, y: 0.95)
        }
    }
}

I have learned that the delay happens because delaysContentTouches property is automatically set to true in UICollectionViews, in order to detect properly scrolling and selecting touches of user. So I have set it to false , and also since collectionView was located inside the scrollView as I mentioned above - I had to also set delaysContentTouches to false in the scrollView in order to remove the delay between touch and shrinking for collectionView cells.

The problem is that when I set delaysContentTouches to false in scrollView - it also automatically applies to tableView, and cells inside tableView also begin highlighting immediately when you're just scrolling up and down, which is definitely undesired behaviour in this case.

I have tried setting delaysContentTouches in tableView to true , but this did not help to prevent this behaviour.

Is there any way to make my cells shrinking immediately only for collectionView, without touching the functionality of tableView highlighting in this case? I am quite new to this so would appreciate any advice.

Answer 1

Not sure if this helps or not, but why aren't you using UICollectionView's didSelectItemAt instead of didHighlightItemAt ?

That may be another reason for the delay.