Gyroscope

The accelerometer is similar to the gyroscope. While the accelerometer detects translation along the x, y, and z axes, the gyroscope detects rotation around those axes:

Figure 11.2: Rotational motion along the x, y, and z axes

Using the gyroscope is very similar to using the accelerometer; we still need to set up our motionManager with an operation queue and a handler to process the data. Let's take a look at what the code looks like:

class ViewController: UIViewController {

    let motionManager = CMMotionManager()
    let motionQueue = OperationQueue()

    override func viewDidLoad() {
        super.viewDidLoad()
        
        if motionManager.isAccelerometerAvailable {
            motionManager.accelerometerUpdateInterval = 0.25
            motionManager.startAccelerometerUpdates(to: motionQueue, withHandler: onAccelerometerUpdate)
        }
        
        if motionManager.isGyroAvailable {
            motionManager.gyroUpdateInterval = 0.25
            motionManager...