[SOLVED] Will searching for a subview with a private API class name be rejected?

Will searching for a subview with a private API class name be rejected?

Apple recently introduced the UICollectionViewCompositionalLayout for UICollectionViews which are amazing. Their only limitation is that when setting the orthogonalScrollingBehavior to continuous, the scroll view delegate methods and contentOffset of the collectionView are missing as the "scrolling behaviour" is accomplished with a totally different scroll view not given to the user.

For a non-essential pure nicety feature I need to access the contentOffset of the collection view which is always (0, 0) when using the new UICollectionViewCompositionalLayout. However if I simply get the abstracted away UIScrollView then I can check the contentOffset and make the necessary calculation with it.

My code to achieve this:

let view = collectionView.subviews.first(where: { view in
  return String(describing: type(of: view)) == "_UICollectionViewOrthogonalScrollerEmbeddedScrollView"
})

return view as? UIScrollView

I am aware that this may change tomorrow and break this code upon a new version of iOS being released. As I said this is mostly a nicety feature that I would really like to have but it is mostly inessential to the rest of the app. That aside, will this get me rejected for "using" private APIs?

Solution

You could use visibleItemsInvalidationHandler to get contentOffset

layoutSection.visibleItemsInvalidationHandler = ({ (visibleItems, point, env) in
         print(point)
    })