回転を検知する

このように extension しておくと、 onRotate で拾えるようになる

swift

struct DeviceRotationViewModifier: ViewModifier {
 let action: (UIDeviceOrientation) -> Void

 func body(content: Content) -> some View {
  content
   .onAppear()
   .onReceive(NotificationCenter.default.publisher(for: UIDevice.orientationDidChangeNotification)) { _ in
    action(UIDevice.current.orientation)
   }
 }
}

extension View {
 func onRotate(perform action: @escaping (UIDeviceOrientation) -> Void) -> some View {
  self.modifier(DeviceRotationViewModifier(action: action))
 }
}

swift

.onRotate { newOrientation in
}