Detect a Shake gesture in SwiftUI

DetectShakeSwiftUI.swift

import SwiftUI

/// Detect a Shake gesture in SwiftUI
/// Based on https://stackoverflow.com/a/60085784/128083
struct ShakableViewRepresentable: UIViewControllerRepresentable {
    let onShake: () -> ()

    class ShakeableViewController: UIViewController {
        var onShake: (() -> ())?

        override func motionBegan(_ motion: UIEvent.EventSubtype, with event: UIEvent?) {
            if motion == .motionShake {
                onShake?()
            }
        }
    }

    func makeUIViewController(context: Context) -> ShakeableViewController {
        let controller = ShakeableViewController()
        controller.onShake = onShake
        return controller
    }
    
    func updateUIViewController(_ uiViewController: ShakeableViewController, context: Context) {}
}

extension View {
    func onShake(_ block: @escaping () -> Void) -> some View {
        overlay(
            ShakableViewRepresentable(onShake: block).allowsHitTesting(false)
        )
    }
}

struct ContentView: View {
    var body: some View {
        Button("Example") {
            print("Example")
        }
        .onShake {
            print("Shake")
        }
    }
}