Reset or change button title at the end of countdown - ios

Question

I'm building an app for iPhone/iPad. My app has a countdown timer. The countdown start button is labled "Start", and it switches to "Running" when the button is pressed. When the countdown has reached 00:00, I want the button title to reset itself to "Start" or change it to "Restart", so that the user can start all over again.
I'm new to Swift, so I hope someone can help with this. Here's my code:
import Foundation
import UIKit
import AVFoundation
class VC11 : UIViewController {
#IBOutlet weak var timerLabel: UILabel!
var timer = NSTimer()
var count = 240
var timerRunning = false
var audioPlayer = AVAudioPlayer()
override func viewDidLoad() {
super.viewDidLoad()
func nextPage(sender:UISwipeGestureRecognizer) {
switch sender.direction {
case UISwipeGestureRecognizerDirection.Left:
print("SWIPED LEFT")
self.performSegueWithIdentifier("seg11", sender: nil)
default:
break
}
var leftSwipe = UISwipeGestureRecognizer (target: self, action: Selector("nextPage"))
var rightSwipe = UISwipeGestureRecognizer (target: self, action: Selector("nextPage"))
leftSwipe.direction = .Left
rightSwipe.direction = .Right
view.addGestureRecognizer(leftSwipe)
view.addGestureRecognizer(rightSwipe)
}
}
func updateTime() {
count--
let seconds = count % 60
let minutes = (count / 60) % 60
let hours = count / 3600
let strHours = hours > 9 ? String(hours) : "0" + String(hours)
let strMinutes = minutes > 9 ? String(minutes) : "0" + String(minutes)
let strSeconds = seconds > 9 ? String(seconds) : "0" + String(seconds)
if hours > 0 {
timerLabel.text = "\(strHours):\(strMinutes):\(strSeconds)"
}
else {
timerLabel.text = "\(strMinutes):\(strSeconds)"
}
stopTimer()
}
#IBAction func startTimer(sender: AnyObject) {
timer = NSTimer.scheduledTimerWithTimeInterval(1.0, target: self, selector: Selector("updateTime"), userInfo: nil, repeats: true)
sender.setTitle("Running...", forState: .Normal)
}
func stopTimer()
{
if count == 0 {
timer.invalidate()
timerRunning = false
timerLabel.text = "04:00"
playSound()
count = 240
}
}
func playSound() {
var soundPath = NSBundle.mainBundle().pathForResource("Metal_Gong", ofType: "wav")
var soundURL = NSURL.fileURLWithPath(soundPath!)
self.audioPlayer = AVAudioPlayer(contentsOfURL: soundURL, error: nil)
self.audioPlayer.play()
}
}

Answer 1

Its simple, if you have button in storyBoard then just take outlet of the button from storyBoard, as you have taken for timerlabel, like this
#IBOutlet weak var yourButton: UIButton!
And then in your stopTimer() func just change the title of your button like this,
func stopTimer()
{
if count == 0 {
timer.invalidate()
timerRunning = false
timerLabel.text = "04:00"
playSound()
count = 240
yourButton.setTitle("Restart", forState: .Normal)// add this line in your code
}
}