var soundEffect = AVAudioPlayer()

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!")
    }
}

工作在swift 4最新版本。ButtonTag是界面上按钮上的一个标签。笔记在与Main.storyboard平行的文件夹中的一个文件夹中。每个音符都被命名为note1、note2等。ButtonTag给出了被点击按钮的数字1、2等，并将其作为参数传递

import AVFoundation

import AudioToolbox

public final class MP3Player : NSObject {
    
    // Singleton class
    static let shared:MP3Player = MP3Player()
    
    private var player: AVAudioPlayer? = nil
    
    // Play only mp3 which are stored in the local
    public func playLocalFile(name:String) {
        guard let url = Bundle.main.url(forResource: name, withExtension: "mp3") else { return }

        do {
            try AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playback)
            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)
        }
    }
}

调用这个函数

MP3Player.shared.playLocalFile(name: "JungleBook")

Swift 4(兼容iOS 12)

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)
}

var soundEffect = AVAudioPlayer()

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!")
    }
}

工作在swift 4最新版本。ButtonTag是界面上按钮上的一个标签。笔记在与Main.storyboard平行的文件夹中的一个文件夹中。每个音符都被命名为note1、note2等。ButtonTag给出了被点击按钮的数字1、2等，并将其作为参数传递

iOS 12 - Xcode 10 beta 6 - Swift 4.2

只使用1个IBAction并将所有按钮指向该1个动作。

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!")
    }
}

Swift 5“AVFoundation”\

简单的代码，没有错误处理，从本地路径播放音频

import AVFoundation
var audio:AVPlayer!

func stopAlarm() {
    // To pause or stop audio in swift 5 audio.stop() isn't working
    audio.pause()
}

func playAlarm() {
    // need to declare local path as url
    let url = Bundle.main.url(forResource: "Alarm", withExtension: "mp3")
    // now use declared path 'url' to initialize the player
    audio = AVPlayer.init(url: url!)
    // after initialization play audio its just like click on play button
    audio.play()
}