shake.swift

extension NSNotification.Name {
  public static let deviceDidShakeNotification =   NSNotification.Name("MyDeviceDidShakeNotification")
}
extension UIWindow {
  open override func motionEnded(_ motion: UIEvent.EventSubtype, with event: UIEvent?) {
  super.motionEnded(motion, with: event)
  NotificationCenter.default.post(name: .deviceDidShakeNotification, object: event)
}
}
extension View {
  func onShake(perform action: @escaping () -> Void) -> some View {
  self.modifier(ShakeDetector(onShake: action))
  }
}
struct ShakeDetector: ViewModifier {
  let onShake: () -> Void
func body(content: Content) -> some View {
  content
    .onAppear() // this has to be here because of a SwiftUI bug
    .onReceive(NotificationCenter.default.publisher(for:
    .deviceDidShakeNotification)) { _ in
    onShake()
    }
  }
}