Swift Example

import UIKit
import CoreMotion

class ViewController: UIViewController {

    @IBOutlet var Ball: UIImageView
    @IBOutlet var x: UILabel?

    var motionManager = CMMotionManager()

    var acceleration:CMAcceleration = CMAcceleration(x: 0, y: 0, z: 0)



    override func viewDidLoad() {
        super.viewDidLoad()

        var timer = NSTimer.scheduledTimerWithTimeInterval(0.03, target: self,
            selector: Selector("update"),
            userInfo: nil,
            repeats: true)

        var timer1 = NSTimer.scheduledTimerWithTimeInterval(5.0, target: self,
            selector: Selector("setText"),
            userInfo: nil,
            repeats: true)

    }


    func update (){
        if(self.motionManager.accelerometerAvailable){

            var queue = NSOperationQueue()
            motionManager.startAccelerometerUpdatesToQueue(queue, withHandler: {(accelerometerData :     CMAccelerometerData!, error : NSError!) in
                self.acceleration = accelerometerData.acceleration
                })
        }
        Ball.center = CGPointMake(Ball.center.x + CGFloat(acceleration.x * 50), Ball.center.y)
        if(Ball.center.x < 25 ){
        Ball.center.x = 25}
        if(Ball.center.x > 743 ){
            Ball.center.x = 743}




    }

    func setText(){

        self.x!.text = acceleration.x.description
    }

}