Handling UIScrollView Content Size Update in iOS 17 with Dynamic Content Height Issues
I've been banging my head against this for hours. I've been struggling with this for a few days now and could really use some help. I'm sure I'm missing something obvious here, but I've looked through the documentation and I'm still confused about I've been banging my head against this for hours... I'm working with an scenario with a UIScrollView in my iOS 17 app where the content size doesn't seem to update correctly when adding dynamic content. I'm programmatically adding UILabels to the scroll view based on user input, but after adding a new label, the scroll view does not scroll as expected, and the content size remains fixed at its initial size. Here’s what I have so far: ```swift class ViewController: UIViewController { let scrollView = UIScrollView() var contentView = UIView() var currentY: CGFloat = 0 override func viewDidLoad() { super.viewDidLoad() setupScrollView() } func setupScrollView() { scrollView.frame = view.bounds scrollView.backgroundColor = .lightGray view.addSubview(scrollView) contentView.frame = CGRect(x: 0, y: 0, width: view.frame.width, height: 0) scrollView.addSubview(contentView) } func addLabel(withText text: String) { let label = UILabel() label.text = text label.sizeToFit() label.frame.origin = CGPoint(x: 10, y: currentY) contentView.addSubview(label) currentY += label.frame.height + 10 contentView.frame.size.height = currentY scrollView.contentSize = contentView.frame.size } } ``` I call `addLabel(withText:)` whenever the user submits a new text. However, even though I update `contentView.frame.size.height` and set the `scrollView.contentSize`, I still see that the scroll view does not scroll to the bottom after I add new labels. I’ve tried calling `layoutIfNeeded()` on both the scroll view and the content view after updating the sizes, but that didn’t help. Additionally, I’m not seeing any constraints set up on the content view. Is it necessary to use Auto Layout for the scroll view to update correctly, or am I missing something in my manual frame updates? I’m testing this on an iPhone 12 running iOS 17. Any insight into what I might be doing wrong or what I can check to debug this scenario would be greatly appreciated! Thanks in advance! I'm working on a API that needs to handle this. What's the best practice here? My development environment is macOS. Thanks in advance! I'm using Swift LTS in this project. What would be the recommended way to handle this?