PreferencesModel.swift
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PreferencesModel.swift
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	import SwiftUI

	class PreferencesModel: ObservableObject {
	/* We're stuck dropping into AppKit/UIKit to set light/dark schemes for now,
	* because setting the .preferredColorScheme modifier on views in SwiftUI is
	* currently unreliable.
	*
	* Feedback submitted to Apple:
	*
	* FB8382883: "On macOS 11β4, preferredColorScheme modifier does not respect .light ColorScheme"
	* FB8383053: "On iOS 14β4/macOS 11β4, it is not possible to unset preferredColorScheme after setting
	* it to either .light or .dark"
	*/

	#if os(iOS)
	var window: UIWindow? {
	guard let scene = UIApplication.shared.connectedScenes.first,
	let windowSceneDelegate = scene.delegate as? UIWindowSceneDelegate,
	let window = windowSceneDelegate.window else {
	return nil
	}
	return window
	}
	#endif

	@Published var selectedColorScheme: ColorScheme?
	@Published var appearance: Int = 0 {
	didSet {
	switch appearance {
	case 1:
	// selectedColorScheme = .light
	#if os(macOS)
	NSApp.appearance = NSAppearance(named: .aqua)
	#else
	window?.overrideUserInterfaceStyle = .light
	#endif
	case 2:
	// selectedColorScheme = .dark
	#if os(macOS)
	NSApp.appearance = NSAppearance(named: .darkAqua)
	#else
	window?.overrideUserInterfaceStyle = .dark
	#endif
	default:
	// selectedColorScheme = .none
	#if os(macOS)
	NSApp.appearance = nil
	#else
	window?.overrideUserInterfaceStyle = .unspecified
	#endif
	}
	}
	}
	}