Swift version: 5.6
If you need to take specific action depending on whether your user is running in light mode or dark mode – for example, doing some different drawing – then you should query the userInterfaceStyle
of your view controller’s trait collection.
For example, this will print one of two messages when the user taps the screen depending on whether the device is set to light mode or dark mode:
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
if traitCollection.userInterfaceStyle == .light {
print("Light mode")
} else {
print("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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