Как воспроизвести звук с помощью Swift?

на Swift 3:

import AVFoundation

/// **must** define instance variable outside, because .play() will deallocate AVAudioPlayer 
/// immediately and you won't hear a thing
var player: AVAudioPlayer?

func playSound() {
    guard let url = Bundle.main.url(forResource: "soundName", withExtension: "mp3") else {
        print("url not found")
        return
    }

    do {
        /// this codes for making this app ready to takeover the device audio
        try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
        try AVAudioSession.sharedInstance().setActive(true)

        /// change fileTypeHint according to the type of your audio file (you can omit this)

        player = try AVAudioPlayer(contentsOf: url, fileTypeHint: AVFileTypeMPEGLayer3)

        // no need for prepareToPlay because prepareToPlay is happen automatically when calling play()
        player!.play()
    } catch let error as NSError {
        print("error: \(error.localizedDescription)")
    }
}

лучшая практика для местных активов-поместить его внутрь assets.xcassets и вы загружаете файл следующим образом:

func playSound() {
    guard let url = Bundle.main.url(forResource: "soundName", withExtension: "mp3") else {
        print("url not found")
        return
    }

    do {
        /// this codes for making this app ready to takeover the device audio
        try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
        try AVAudioSession.sharedInstance().setActive(true)

        /// change fileTypeHint according to the type of your audio file (you can omit this)

        /// for iOS 11 onward, use :
        player = try AVAudioPlayer(contentsOf: url, fileTypeHint: AVFileType.mp3.rawValue)

        /// else :
        /// player = try AVAudioPlayer(contentsOf: url, fileTypeHint: AVFileTypeMPEGLayer3)

        // no need for prepareToPlay because prepareToPlay is happen automatically when calling play()
        player!.play()
    } catch let error as NSError {
        print("error: \(error.localizedDescription)")
    }
}

iOS 12-Xcode 10 beta 6-Swift 4.2

используйте только 1 IBAction и наведите все кнопки на это 1 действие.

import AVFoundation

    var player = AVAudioPlayer()

@IBAction func notePressed(_ sender: UIButton) {

        print(sender.tag) // testing button pressed tag

        let path = Bundle.main.path(forResource: "note\(sender.tag)", ofType : "wav")!
        let url = URL(fileURLWithPath : path)

        do {
            player = try AVAudioPlayer(contentsOf: url)
            player.play()

        } catch {

            print ("There is an issue with this code!")

        }

}

если код не генерирует никаких ошибок, но вы не слышите звук-создайте плеер в качестве экземпляра:

   static var player: AVAudioPlayer!

для меня первое решение работало, когда я сделал это изменение:)

Swift 3

import AVFoundation


var myAudio: AVAudioPlayer!

    let path = Bundle.main.path(forResource: "example", ofType: "mp3")!
    let url = URL(fileURLWithPath: path)
do {
    let sound = try AVAudioPlayer(contentsOf: url)
    myAudio = sound
    sound.play()
} catch {
    // 
}

//If you want to stop the sound, you should use its stop()method.if you try to stop a sound that doesn't exist your app will crash, so it's best to check that it exists.

if myAudio != nil {
    myAudio.stop()
    myAudio = nil
}

Swift 4 (iOS 12 совместимый)

    var player: AVAudioPlayer?

    let path = Bundle.main.path(forResource: "note\(sender.tag)", ofType: "wav")
    let url = URL(fileURLWithPath: path ?? "")

    do {
        player = try AVAudioPlayer(contentsOf: url)
        player?.play()
    } catch let error {
        print(error.localizedDescription)
    }

func playSound(_ buttonTag : Int){

    let path = Bundle.main.path(forResource: "note\(buttonTag)", ofType : "wav")!
    let url = URL(fileURLWithPath : path)

    do{
        soundEffect = try AVAudioPlayer(contentsOf: url)
        soundEffect?.play()
        // to stop the spound .stop()
    }catch{
        print ("file could not be loaded or other error!")
    }
}

работает в последней версии swift 4. ButtonTag будет тегом на кнопке на вашем интерфейсе. Заметки находятся в папке в папке, параллельной Main.раскадровка. Каждая нота называется примечание1, примечание2 и т. д. ButtonTag дает число 1, 2 и т. д. от кнопки, нажатой, которая передается как param

сначала импортируйте эти библиотеки

import AVFoundation

import AudioToolbox    

установить делегат, как это

   AVAudioPlayerDelegate

написать этот красивый код на кнопку действия или что-то действие:

guard let url = Bundle.main.url(forResource: "ring", withExtension: "mp3") else { return }
    do {
        try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
        try AVAudioSession.sharedInstance().setActive(true)
        player = try AVAudioPlayer(contentsOf: url, fileTypeHint: AVFileType.mp3.rawValue)
        guard let player = player else { return }

        player.play()
    }catch let error{
        print(error.localizedDescription)
    }

100% работает в моем проекте и протестированы