Overriding delegate property of UIScrollView in Swift (like UICollectionView does)

Question

UIScrollView has a delegate property which conforms to UIScrollViewDelegate

protocol UIScrollViewDelegate : NSObjectProtocol {
    //...
}
class UIScrollView : U         


        

Answer 1

You can do like this:

protocol ExtendedUIScrollViewDelegate: UIScrollViewDelegate {
    func someNewFunction()
}

class CustomScrollView: UIScrollView {

    weak var myDelegate: ExtendedScrollViewDelegate?
    override weak var delegate: UIScrollViewDelegate? {
        didSet {
            myDelegate = delegate as? ExtendedScrollViewDelegate
        }
    }
}

Hope this helps