👀 Views: 0 💬 Answers: 1 📅 Created: 2025-09-06

ios swift uiview

I'm stuck trying to I need some guidance on After trying multiple solutions online, I still can't figure this out... I'm encountering a frustrating issue where my custom UIView doesn't update its appearance when a property changes. I have a custom UIView subclass that displays a label and changes its background color based on a boolean property. The property is updated from a view controller, but the view does not visually reflect the change. I've tried calling `setNeedsDisplay()` and `layoutIfNeeded()` after changing the property, but the UI remains the same. Here is my custom view class: ```swift class CustomColorView: UIView { var isHighlighted: Bool = false { didSet { updateAppearance() } } private let label: UILabel = { let lbl = UILabel() lbl.translatesAutoresizingMaskIntoConstraints = false return lbl }() override init(frame: CGRect) { super.init(frame: frame) setupView() } required init?(coder: NSCoder) { super.init(coder: coder) setupView() } private func setupView() { addSubview(label) label.center = center label.text = "Tap to Highlight" // Set up constraints for label } private func updateAppearance() { backgroundColor = isHighlighted ? UIColor.yellow : UIColor.white setNeedsDisplay() // I've added this, but it doesn't help } } ``` In my view controller, I'm changing the `isHighlighted` property like this: ```swift class ViewController: UIViewController { private let customView = CustomColorView() override func viewDidLoad() { super.viewDidLoad() view.addSubview(customView) // Set up constraints for customView } @objc func toggleHighlight() { customView.isHighlighted.toggle() // This doesn't seem to trigger an update } } ``` I'm also registering a tap gesture to call `toggleHighlight()`, but even when the method is executed, the background color does not change. The label text displays correctly, but the view itself is not refreshing visually. I’ve tried debugging with breakpoints and verified that `updateAppearance()` is being called and the property is toggling, yet there's no visual change. Any insights on what might be going wrong here or how to force the view to refresh its appearance? I'd really appreciate any guidance on this. My development environment is Ubuntu 20.04. Thanks for any help you can provide! What are your experiences with this?