iOS 26: UIScrollView topEdgeEffect not working?

November 21, 2025

3

I’m making an attempt to make use of the topEdgeEffect API in iOS 26, however even setting the impact model to ".tender" doesn’t work:

class ViewController: UIViewController {

  var scrollView: UIScrollView!

  override func viewDidLoad() {
    tremendous.viewDidLoad()
    
    // Create and configure UIScrollView
    scrollView = UIScrollView()
    scrollView.translatesAutoresizingMaskIntoConstraints = false
    scrollView.topEdgeEffect.model = .tender // <- This could work
    view.addSubview(scrollView)
    
    // Pin scrollView to fill the entire view
    NSLayoutConstraint.activate([
      scrollView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
      scrollView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
      scrollView.topAnchor.constraint(equalTo: view.topAnchor),
      scrollView.bottomAnchor.constraint(equalTo: view.bottomAnchor)
    ])
    
    // Create label with multiline textual content
    let label = UILabel()
    label.translatesAutoresizingMaskIntoConstraints = false
    label.numberOfLines = 0
    label.textual content = """
Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.
(Extra lengthy textual content)
"""

    // Add label to scrollView
    scrollView.addSubview(label)
    
    // Constraints to make label fill scrollView width and outline content material top
    NSLayoutConstraint.activate([
      label.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor),
      label.trailingAnchor.constraint(equalTo: scrollView.trailingAnchor),
      label.topAnchor.constraint(equalTo: scrollView.topAnchor),
      label.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor),
      label.widthAnchor.constraint(equalTo: scrollView.widthAnchor) // fix width to scrollView width
    ])
  }
}