Question

我正在尝试在AVAudioPlayer实例上播放多个声音文件，但是当播放一个声音时，另一个声音停止播放。我不能一次播放多个声音。这是我的代码：

import AVFoundation

class GSAudio{

    static var instance: GSAudio!

    var soundFileNameURL: NSURL = NSURL()
    var soundFileName = ""
    var soundPlay = AVAudioPlayer()

    func playSound (soundFile: String){

        GSAudio.instance = self

        soundFileName = soundFile
        soundFileNameURL = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource(soundFileName, ofType: "aif", inDirectory:"Sounds")!)
        do{
            try soundPlay = AVAudioPlayer(contentsOfURL: soundFileNameURL)
        } catch {
            print("Could not play sound file!")
        }

        soundPlay.prepareToPlay()
        soundPlay.play ()
    }
}

任何人都可以通过告诉我如何一次播放多个声音文件来帮助我吗？任何帮助深表感谢。

非常感谢，启

Answer 1

音频停止的原因是因为您只设置了一个AVAudioPlayer，因此当您要求班级播放另一个声音时，您正在使用新的AVAudioPlayer实例替换旧实例。你基本上都在覆盖它。

您可以创建GSAudio类的两个实例，然后在每个实例上调用playSound，或者使该类成为使用audioPlayers字典的通用音频管理器。

我更喜欢后一种选择，因为它允许更清晰的代码并且也更有效。你可以检查一下你之前是否已经为声音制作了一个播放器，而不是制作新的播放器。

无论如何，我为你重新上课，以便一次播放多个声音。它也可以播放相同的声音（它不能代替以前的声音实例）希望它有所帮助！

该类是单例，因此要访问类使用：

GSAudio.sharedInstance

例如，要播放您要调用的声音：

GSAudio.sharedInstance.playSound("AudioFileName")

并立即播放多个声音：

GSAudio.sharedInstance.playSounds("AudioFileName1", "AudioFileName2")

或者您可以在某处加载数组中的声音并调用接受数组的playSounds函数：

let sounds = ["AudioFileName1", "AudioFileName2"]
GSAudio.sharedInstance.playSounds(sounds)

我还添加了一个playSounds函数，它允许您以级联的格式延迟播放的每个声音。所以：

 let soundFileNames = ["SoundFileName1", "SoundFileName2", "SoundFileName3"]
 GSAudio.sharedInstance.playSounds(soundFileNames, withDelay: 1.0)

会在sound1之后播放sound2，然后sound3将在sound2等之后播放第二个。

这是班级：

class GSAudio: NSObject, AVAudioPlayerDelegate {

    static let sharedInstance = GSAudio()

    private override init() {}

    var players = [NSURL:AVAudioPlayer]()
    var duplicatePlayers = [AVAudioPlayer]()

    func playSound (soundFileName: String){

        let soundFileNameURL = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource(soundFileName, ofType: "aif", inDirectory:"Sounds")!)

        if let player = players[soundFileNameURL] { //player for sound has been found

            if player.playing == false { //player is not in use, so use that one
                player.prepareToPlay()
                player.play()

            } else { // player is in use, create a new, duplicate, player and use that instead

                let duplicatePlayer = try! AVAudioPlayer(contentsOfURL: soundFileNameURL)
                //use 'try!' because we know the URL worked before.

                duplicatePlayer.delegate = self
                //assign delegate for duplicatePlayer so delegate can remove the duplicate once it's stopped playing

                duplicatePlayers.append(duplicatePlayer)
                //add duplicate to array so it doesn't get removed from memory before finishing

                duplicatePlayer.prepareToPlay()
                duplicatePlayer.play()

            }
        } else { //player has not been found, create a new player with the URL if possible
            do{
                let player = try AVAudioPlayer(contentsOfURL: soundFileNameURL)
                players[soundFileNameURL] = player
                player.prepareToPlay()
                player.play()
            } catch {
                print("Could not play sound file!")
            }
        }
    }


    func playSounds(soundFileNames: [String]){

        for soundFileName in soundFileNames {
            playSound(soundFileName)
        }
    }

    func playSounds(soundFileNames: String...){
        for soundFileName in soundFileNames {
            playSound(soundFileName)
        }
    }

    func playSounds(soundFileNames: [String], withDelay: Double) { //withDelay is in seconds
        for (index, soundFileName) in soundFileNames.enumerate() {
            let delay = withDelay*Double(index)
            let _ = NSTimer.scheduledTimerWithTimeInterval(delay, target: self, selector: #selector(playSoundNotification(_:)), userInfo: ["fileName":soundFileName], repeats: false)
        }
    }

     func playSoundNotification(notification: NSNotification) {
        if let soundFileName = notification.userInfo?["fileName"] as? String {
             playSound(soundFileName)
         }
     }

     func audioPlayerDidFinishPlaying(player: AVAudioPlayer, successfully flag: Bool) {
        duplicatePlayers.removeAtIndex(duplicatePlayers.indexOf(player)!)
        //Remove the duplicate player once it is done
    }

}

Answer 2

这是一个Swift 4版本的@Oliver Wilkinson代码，带有一些安全检查和改进的代码格式：

import Foundation
import AVFoundation

class GSAudio: NSObject, AVAudioPlayerDelegate {

    static let sharedInstance = GSAudio()

    private override init() { }

    var players: [URL: AVAudioPlayer] = [:]
    var duplicatePlayers: [AVAudioPlayer] = []

    func playSound(soundFileName: String) {

        guard let bundle = Bundle.main.path(forResource: soundFileName, ofType: "aac") else { return }
        let soundFileNameURL = URL(fileURLWithPath: bundle)

        if let player = players[soundFileNameURL] { //player for sound has been found

            if !player.isPlaying { //player is not in use, so use that one
                player.prepareToPlay()
                player.play()
            } else { // player is in use, create a new, duplicate, player and use that instead

                do {
                    let duplicatePlayer = try AVAudioPlayer(contentsOf: soundFileNameURL)

                    duplicatePlayer.delegate = self
                    //assign delegate for duplicatePlayer so delegate can remove the duplicate once it's stopped playing

                    duplicatePlayers.append(duplicatePlayer)
                    //add duplicate to array so it doesn't get removed from memory before finishing

                    duplicatePlayer.prepareToPlay()
                    duplicatePlayer.play()
                } catch let error {
                    print(error.localizedDescription)
                }

            }
        } else { //player has not been found, create a new player with the URL if possible
            do {
                let player = try AVAudioPlayer(contentsOf: soundFileNameURL)
                players[soundFileNameURL] = player
                player.prepareToPlay()
                player.play()
            } catch let error {
                print(error.localizedDescription)
            }
        }
    }


    func playSounds(soundFileNames: [String]) {
        for soundFileName in soundFileNames {
            playSound(soundFileName: soundFileName)
        }
    }

    func playSounds(soundFileNames: String...) {
        for soundFileName in soundFileNames {
            playSound(soundFileName: soundFileName)
        }
    }

    func playSounds(soundFileNames: [String], withDelay: Double) { //withDelay is in seconds
        for (index, soundFileName) in soundFileNames.enumerated() {
            let delay = withDelay * Double(index)
            let _ = Timer.scheduledTimer(timeInterval: delay, target: self, selector: #selector(playSoundNotification(_:)), userInfo: ["fileName": soundFileName], repeats: false)
        }
    }

    @objc func playSoundNotification(_ notification: NSNotification) {
        if let soundFileName = notification.userInfo?["fileName"] as? String {
            playSound(soundFileName: soundFileName)
        }
    }

    func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
        if let index = duplicatePlayers.index(of: player) {
            duplicatePlayers.remove(at: index)
        }
    }

}

Answer 3

我创建了一个帮助库，简化了Swift中的播放声音。它创建AVAudioPlayer的多个实例，以允许同时多次播放相同的声音。您可以从Github下载或使用Cocoapods导入。

以下是链接：SwiftySound

用法尽可能简单：

Sound.play(file: "sound.mp3")

Answer 4

所有答案都是发布代码页面;它不需要那么复杂。

// Create a new player for the sound; it doesn't matter which sound file this is
                let soundPlayer = try AVAudioPlayer( contentsOf: url )
                soundPlayer.numberOfLoops = 0
                soundPlayer.volume = 1
                soundPlayer.play()
                soundPlayers.append( soundPlayer )

// In an timer based loop or other callback such as display link, prune out players that are done, thus deallocating them
        checkSfx: for player in soundPlayers {
            if player.isPlaying { continue } else {
                if let index = soundPlayers.index(of: player) {
                    soundPlayers.remove(at: index)
                    break checkSfx
                }
            }
        }

让AVAudioPlayer一次播放多个声音

4 个答案: