SwiftUI alert and confirmation dialog preferredColorScheme

Question

I've noticed when setting the preferredColorScheme in my SwiftUI app the .alert and .confirmationDialog modifiers don't use the colorScheme. Also the launch screen doesn't use the colorScheme either. It seems to be using system defaults, is this normal behaviour?

struct MyApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
                .preferredColorScheme(.light)
        }
    }
}

I was also unable to get better results using UIKit's overrideUserInterfaceStyle. The launch screen is still using system defaults, unsure how to solve that in SwiftUI without a launch screen. Also the code becomes pretty ugly and much more extensive.

guard let scene = scenes.first as? UIWindowScene else { return }
scene.keyWindow?.overrideUserInterfaceStyle = .light // .light .dark .unspecified

Answer 1

I couldn't figure out a pure SwiftUI way, but I found a simple solution. Use UIKit, then handle the changes in SwiftUI. I just needed to use .overrideUserInterfaceStyle. As for the Launch Screen in SwiftUI, add a Background color key to the dictionary. Then add a Color setfrom your assets and set the Background color key value to the name of the asset created as a String.

let scenes = UIApplication.shared.connectedScenes
guard let scene = scenes.first as? UIWindowScene else { return nil }
scene.keyWindow?.overrideUserInterfaceStyle = .light //.dark, .light, .unspecified