Hide the details of a View when resigning a SwiftUI app to background

MaskingView.swift

struct MaskingViewModifier: ViewModifier {

	@Environment(\.scenePhase)
	private var scenePhase

	@State private var selectedPhase: ScenePhase?

	func body(content: Content) -> some View {
		ZStack {
			content
				.blur(radius: selectedPhase == .active ? 0 : 5)

			Image("splash")
				.opacity(selectedPhase == .active ? 0 : 1)
		}
		.onChange(of: scenePhase) { phase in
			switch phase {
				case .background:
					selectedPhase = .background
				case .inactive:
					selectedPhase = .inactive
				case .active:
					selectedPhase = .active
				@unknown default:
					selectedPhase = nil
			}
		}
	}
}

// add it to the view for easy access
extension View {
	func maskView() -> some View {
		return modifier(MaskingViewModifier())
	}
}