Play sound with a little delay - swift

Question

I have a sound in my app that starts automatically when appear the view; but, as the title says, I'd like that this sounds starts with a little delay, about an half second after the view appear. I tried to use PlayAtTime, but or it does not work or I have set somethings wrong...
This is my code:
var player = AVAudioPlayer?
override func viewDidLoad()
{
super.viewDidLoad()
playAudioWithDelay()
}
func playAudioWithDelay()
{
let file = NSBundle.mainBundle().URLForResource("PR1", withExtension: "wav")
player = AVAudioPlayer(contentsOfURL: file, error: nil)
player!.volume = 0.5
player!.numberOfLoops = -1
player!.playAtTime(//I tried with 0.5 but doesn't work)
player!.prepareToPlay()
player!.play()
}

Answer 1

You can try using this:
let seconds = 1.0//Time To Delay
let delay = seconds * Double(NSEC_PER_SEC) // nanoseconds per seconds
var dispatchTime = dispatch_time(DISPATCH_TIME_NOW, Int64(delay))
dispatch_after(dispatchTime, dispatch_get_main_queue(), {
//Play Sound here
})
Full code:
func playAudioWithDelay()
{
let file = NSBundle.mainBundle().URLForResource("PR1", withExtension: "wav")
player = AVAudioPlayer(contentsOfURL: file, error: nil)
player!.volume = 0.5
player!.numberOfLoops = -1
player!.playAtTime(//I tried with 0.5 but doesn't work)
player!.prepareToPlay()
let seconds = 1.0//Time To Delay
let delay = seconds * Double(NSEC_PER_SEC) // nanoseconds per seconds
var dispatchTime = dispatch_time(DISPATCH_TIME_NOW, Int64(delay))
dispatch_after(dispatchTime, dispatch_get_main_queue(), {
player!.play()
})
}

Answer 2

Try the following function implemented in Swift 3.0
var player: AVAudioPlayer?
func playAudioWithDelay()
{
let file = Bundle.main.url(forResource: "PR1", withExtension: "wav")
do {
player = try AVAudioPlayer(contentsOf: file!)
player?.volume = 0.5
player?.numberOfLoops = -1
player?.prepareToPlay()
} catch let error as NSError {
print("error: \(error.localizedDescription)")
}
let seconds = 1.0//Time To Delay
let when = DispatchTime.now() + seconds
DispatchQueue.main.asyncAfter(deadline: when) {
self.play()
}
}
func play() {
if player?.isPlaying == false {
player?.play()
}
}

Answer 3

Swift 5 Audio Delay Settings:
var player: AVAudioPlayer?
func playAudio(soundName: String, extension: String, delay: Double)
{
let file = Bundle.main.url(forResource: soundName, withExtension: extension)
do {
player = try AVAudioPlayer(contentsOf: file!)
player?.volume = 0.5
player?.numberOfLoops = -1
player?.prepareToPlay()
} catch let error as NSError {
print("error: \(error.localizedDescription)")
}
let seconds = delay//Time To Delay
let when = DispatchTime.now() + seconds
DispatchQueue.main.asyncAfter(deadline: when) {
player.play()
}
}