How to respond to the device being shaken

Paul Hudson    October 26th 2018    @twostraws

You can make any UIViewController subclass respond to the device being shaken by overriding the motionBegan method. This is use to handle motion (shaking) but in theory also remote control actions – although I can't say I've ever seen someone write code to handle that!

This code will print a message every time the device is shaken:

override func motionBegan(_ motion: UIEvent.EventSubtype, with event: UIEvent?) {
    print("Device was shaken!")
}

Available from iOS 3.0 – see Hacking with Swift tutorial 20

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