How to check for Dark Mode in iOS? [duplicate]

Answer 1

You can use the following code to check for light, or dark mode in your project:

func viewDidLoad() {
    super.viewDidLoad()

    switch traitCollection.userInterfaceStyle {
        case .light, .unspecified:
            // light mode detected
        case .dark:
            // dark mode detected
    }
}

You can also check for changes in the interface style:

override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
    super.traitCollectionDidChange(previousTraitCollection)

    let userInterfaceStyle = traitCollection.userInterfaceStyle // Either .unspecified, .light, or .dark
    // Update your user interface based on the appearance
}

Just like in macOS since Mojave, you can define images for both light and dark mode in your asset catalogue so that those images will be used automatically:

_{Taken from here.}