Getting gyro updates in background state iOS Swift

Question

Inspired by Nike Running application, I would want to know how can I get gyroscope updates in the Xcode console when the app is in Background/Minimized state. Below mentioned code is working just fine and showing reading of axes pretty smoothly.

    override func viewDidLoad() {
    super.viewDidLoad()

    let motionManager = CMMotionManager()

        motionManager.gyroUpdateInterval = 0.1
        motionManager.startGyroUpdates()
        if motionManager.deviceMotionAvailable {
            motionManager.deviceMotionUpdateInterval = 0.01

            motionManager.startDeviceMotionUpdatesToQueue(NSOperationQueue.mainQueue(), withHandler: { (data: CMDeviceMotion?, error: NSError?) -> Void in
                let x = data!.gravity.x
                let y = data!.gravity.y
                let z = data!.gravity.z

                print(x)

                self.view.backgroundColor = UIColor(
                    red: CGFloat(abs(x)),
                    green: CGFloat(abs(y)),
                    blue: CGFloat(abs(z)),
                    alpha: 1.0)
            })
        }
    }