Swift version: 5.6
By default all instances of UIViewController
are set to automatically adapt their color appearance to match the user’s system preferences, but if you want you can force some or all of your app to use light or dark mode by setting the overrideUserInterfaceStyle
property of your view controller to .light
or .dark
.
For example:
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
overrideUserInterfaceStyle = .dark
}
}
This setting exists on other containers, such as UIWindow
and UIView
, and the value of this property cascades to everything inside the thing you change. So, if you set your main UIWindow
to always have dark mode, then all view controllers and views inside it will always have dark mode.
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Available from iOS 13.0
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
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