Set a delay after UIButton activation - ios

Question

I am working on a dice game that rolls 4 dice with random numbers assigned to each of them. When I press the roll button, the sound effect plays as intended and the images are replaced, but I am looking for a way to prevent the user from pressing roll until the sound effect is finished (maybe 2 seconds).
This is my function that updates dice images, where I have been testing this problem by adding DispatchTime.now() + 2 to the if statements and before arc4random_uniform, but to no avail:
func updateDiceImages() {
randomDiceIndex1 = Int(arc4random_uniform(6))
randomDiceIndex2 = Int(arc4random_uniform(6))
randomDiceIndex3 = Int(arc4random_uniform(6))
randomDiceIndex4 = Int(arc4random_uniform(6))
randomMultiplier = Int(arc4random_uniform(4))
// determine the operator dice at random
if randomMultiplier == 0 {
addDice()
}
if randomMultiplier == 1 {
subDice()
}
if randomMultiplier == 2 {
divDice()
}
if randomMultiplier == 3 {
multDice()
}
// image changes to random dice index
diceImageView1.image = UIImage(named: diceArray[randomDiceIndex1])
diceImageView2.image = UIImage(named: diceArray[randomDiceIndex2])
diceImageView3.image = UIImage(named: diceArray[randomDiceIndex3])
diceImageView4.image = UIImage(named: diceArray[randomDiceIndex4])
multImageView1.image = UIImage(named: multArray[randomMultiplier])
}
If necessary, here is also my function that plays the sound effect, where I also tried implementing DispatchTime.now() + 2:
func rollSound() {
// Set the sound file name & extension
let alertSound = URL(fileURLWithPath: Bundle.main.path(forResource: "diceRoll", ofType: "mp3")!)
do {
// Preparation
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
} catch _ {
}
do {
try AVAudioSession.sharedInstance().setActive(true)
} catch _ {
}
// Play the sound
do {
audioPlayer = try AVAudioPlayer(contentsOf: alertSound)
} catch _{
}
audioPlayer.prepareToPlay()
audioPlayer.play()
}
Here is the implementation that I feel is the closest, but I get many errors:
func rollSound() {
// Set the sound file name & extension
let when = DispatchTime.now() + 2 // change 2 to desired number of seconds
DispatchQueue.main.asyncAfter(deadline: when) {
let alertSound = URL(fileURLWithPath: Bundle.main.path(forResource: "diceRoll", ofType: "mp3")!)
do {
// Preparation
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
} catch _ {
}
do {
try AVAudioSession.sharedInstance().setActive(true)
} catch _ {
}
// Play the sound
do {
audioPlayer = try AVAudioPlayer(contentsOf: alertSound)
} catch _{
}
audioPlayer.prepareToPlay()
audioPlayer.play()
}
}

Answer 1

I have updated code for your error.
func rollSound() {
// Set the sound file name & extension
let when = DispatchTime.now() + 2 // change 2 to desired number of seconds
DispatchQueue.main.asyncAfter(deadline: when) {
let alertSound = URL(fileURLWithPath: Bundle.main.path(forResource: "diceRoll", ofType: "mp3")!)
do {
// Preparation
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
} catch _ {
}
do {
try AVAudioSession.sharedInstance().setActive(true)
} catch _ {
}
// Play the sound
do {
self.audioPlayer = try AVAudioPlayer(contentsOf: alertSound)
} catch _{
}
self.audioPlayer?.prepareToPlay()
self.audioPlayer?.play()
}
}
You need to add self to the property if you want to use class instance into DispatchQueue closer. and same for updateDiceImages()