How can I check whether dark mode is enabled in iOS/iPadOS?

Question

Starting from iOS/iPadOS 13, a dark user interface style is available, similar to the dark mode introduced in macOS Mojave. How can I check whether the user has enabled the

Answer 1

For Swift:

if #available(iOS 12.0, *) {
  switch UIScreen.main.traitCollection.userInterfaceStyle {
    case .dark: // put your dark mode code here
    case .light: 
    case .unspecified: 
  }
}

For Objective C:

if (@available(iOS 12.0, *)) {
        switch (UIScreen.mainScreen.traitCollection.userInterfaceStyle) {
            case UIUserInterfaceStyleDark:
                // put your dark mode code here
                break;
            case UIUserInterfaceStyleLight:
            case UIUserInterfaceStyleUnspecified:
                break;
            default:
                break;
        }
}

For more information watch this WWDC2019 video

Answer 2

You can Easily Detect Dark Mode or Light Mode with this Method Swift 5

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
if traitCollection.userInterfaceStyle == .light {
    print("Light mode")
} else {
    print("Dark mode")
}}

Answer 3

You can use this extension:

import UIKit

extension UIApplication {
    @available(iOS 13.0, *)
    var userInterfaceStyle: UIUserInterfaceStyle? {
        return self.keyWindow?.traitCollection.userInterfaceStyle
    }
}

@available(iOS 13.0, *)
    func setSystemTheme() {
        switch UIApplication.shared.userInterfaceStyle {
        case .dark?:
            currentTheme = .dark
        case .light?:
            currentTheme = .light
        default:
            break
        }
    }

Answer 4

in objective-c you'd want to do:

if( self.traitCollection.userInterfaceStyle == UIUserInterfaceStyleDark ){

        //is dark
}else{

    //is light

}

Answer 5

SwiftUI

With the \.colorScheme key of an Environment variable:

struct ContentView: View {
    @Environment(\.colorScheme) var colorScheme

    var body: some View {
        Text(colorScheme == .dark ? "In dark mode" : "In light mode")
    }
}

Also, it automatically updates on the change of the environment color scheme.

---

UIKit

To check the current, all object those conform to UITraitEnvironment protocol, including all UIView subclasses and all UIViewConttroller subclasses have access to the current style:

myUIView.traitCollection.userInterfaceStyle == .dark
myUIViewController.traitCollection.userInterfaceStyle == .dark

To detect live changes of the style, here is the full detailed answer

Answer 6

Some nice extension maybe ?

public extension UIViewController {
    @available(iOS 12.0, *)
    public var isDarkMode: Bool { traitCollection.userInterfaceStyle == .dark }
}