How do I detect when someone shakes an iPhone?

Question

I want to react when somebody shakes the iPhone. I don\'t particularly care how they shake it, just that it was waved vigorously about for a split second. Does anyone know h

Answer 1

A swiftease version based on the very first answer!

override func motionEnded(_ motion: UIEventSubtype, with event: UIEvent?) {
    if ( event?.subtype == .motionShake )
    {
        print("stop shaking me!")
    }
}