title: Swift Progress View with NSTimer
body: <p>I have a Progress view bar that I would like to use to indicate time. This is my first project in Swift, and I am unsure how to go about this. So any help/ advise would be appreciated ...</p>
  
  <p>(Using Xcode 7.2 and Swift 2.0)</p>
  
  <p>Below Is my view controller. When 'btnPlaySession' is triggered, the content on the view controller is changed every 20 seconds. While the timer is counting to 20, id like to indicate this with the progress bar (so the progress bar resets, each time the content changes). </p>
  
  <pre><code>class CreatedSessionViewController: UIViewController {
  
  var createdSession: [YogaPose]!
  var poseDuration: Double = 20.00 
  var timer = NSTimer!()
  var currentPoseIndex = 1
  
  //Outlets:
  @IBOutlet var poseProgressView: UIProgressView!
  @IBOutlet var lblPoseCount: UILabel!
  @IBOutlet var lblPoseName: UILabel!
  @IBOutlet var imgPose: UIImageView!
  @IBOutlet var tvDescription: UITextView!
  
  // Do any additional setup after loading the view:
  override func viewDidLoad() {
      super.viewDidLoad()
  
      displayFirstPoseInArray()
  }
  
  func displayFirstPoseInArray(){
      lblPoseCount.text = (String(currentPoseIndex) + "/" + String(createdSession.count))
      lblPoseName.text = createdSession[0].title
      imgPose.image = UIImage(named: String(format: "%d.jpg", (createdSession[0].id)!))
      tvDescription.text = createdSession[0].desc
  }
  
  @IBAction func btnPlaySession(sender: AnyObject) {
      timer = NSTimer.scheduledTimerWithTimeInterval(poseDuration, target: self, selector: "getNextPoseData", userInfo: nil, repeats: true)
  }
  
  func getNextPoseData(){
      if (currentPoseIndex &lt; createdSession.count){
  
          setProgressBar()
  
          lblPoseCount.text = (String(currentPoseIndex + 1) + "/" + String(createdSession.count))
          lblPoseName.text = createdSession[currentPoseIndex].title
          imgPose.image = UIImage(named: String(format: "%d.jpg",(createdSession[currentPoseIndex].id)!))
          tvDescription.text = createdSession[currentPoseIndex].desc
          currentPoseIndex += 1
          print(currentPoseIndex)
      }
  }
  
  func setProgressBar(){
  
  
  }
  }
  </code></pre>