👀 Views: 19 💬 Answers: 1 📅 Created: 2025-08-25

iOS Swift DarkMode

After trying multiple solutions online, I still can't figure this out. I've been banging my head against this for hours. I've been trying to implement dark mode support for a custom view I've built for my iOS app running on iOS 17, but I'm facing some unexpected behavior. My view has several labels and buttons that should change their colors based on the system appearance. However, while the system colors update correctly, the custom colors I defined for my UI elements are not adjusting as expected. Here's a snippet from my custom view where I handle the appearance changes: ```swift class CustomView: UIView { private let titleLabel = UILabel() private let actionButton = UIButton() override init(frame: CGRect) { super.init(frame: frame) setupUI() updateColors() // initial color setup } required init?(coder: NSCoder) { super.init(coder: coder) setupUI() updateColors() // initial color setup } private func setupUI() { titleLabel.translatesAutoresizingMaskIntoConstraints = false actionButton.translatesAutoresizingMaskIntoConstraints = false addSubview(titleLabel) addSubview(actionButton) // Layout code here... } private func updateColors() { let isDarkMode = traitCollection.userInterfaceStyle == .dark titleLabel.textColor = isDarkMode ? .white : .black actionButton.backgroundColor = isDarkMode ? .darkGray : .lightGray } override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) { super.traitCollectionDidChange(previousTraitCollection) guard previousTraitCollection?.userInterfaceStyle != traitCollection.userInterfaceStyle else { return } updateColors() // update colors on appearance change } } ``` The issue I'm experiencing is that the `updateColors` method is being called when the trait collection changes, but the colors of the labels and buttons do not reflect the changes. When I log `isDarkMode`, it correctly indicates whether the interface is in dark mode or not. I have also verified that my view is added to the view hierarchy and that the custom view is receiving the trait collection updates as expected. One thing to note is that the `setupUI` method includes some custom constraints to position the UI elements, but I'm not sure if that's interfering with anything. I've tried removing those constraints temporarily, but it didn't help. Additionally, I noticed that when I run the app on a device with the dark mode enabled, the colors are not updated until I navigate away from the screen and back again. Has anyone else encountered this issue or can suggest what I might be missing? I'm developing on Windows 10 with Swift. Cheers for any assistance!