SwiftUI Screen safe area

Question

Im trying to calculate the screen safe area size in a SwiftUI app launch so I can derive component sizes from the safe area rectangle for iOS devices of different screen sizes.

UIScreen.main.bounds - I can use this at the start but it gives me the total screen and not the safe area

GeometryReader - using this I can get the CGSize of the safe area but I cant find a way to send this anywhere - tried using Notifications and simple functions both of which caused errors

Finally I tried using the .onPreferenceSet event in the initial view then within that closure set a CGSize variable in a reference file, but doing that, for some reason makes the first view initialise twice. Does anyone know a good way to get the edge insets or the safe area size at app startup?

Answer 1

More simpler solution :

UIApplication.shared.windows.first { $0.isKeyWindow }?.safeAreaInsets.bottom

or shorter:

UIApplication.shared.windows.first?.safeAreaInsets.top