如何使用Swift播放声音？ [英] How to play a sound using Swift?

问题描述

我想使用Swift播放声音。

I would like to play a sound using Swift.

我的代码在Swift 1.0中运行但现在它在Swift 2或更新版本中不再起作用。

My code worked in Swift 1.0 but now it doesn't work anymore in Swift 2 or newer.

override func viewDidLoad() {
    super.viewDidLoad()

    let url:NSURL = NSBundle.mainBundle().URLForResource("soundName", withExtension: "mp3")!

    do { 
        player = try AVAudioPlayer(contentsOfURL: url, fileTypeHint: nil) 
    } catch _{
        return
    }

    bgMusic.numberOfLoops = 1
    bgMusic.prepareToPlay()


    if (Data.backgroundMenuPlayed == 0){
        player.play()
        Data.backgroundMenuPlayed = 1
    }
}

推荐答案

最好您可能希望使用 AVFoundation 。
它提供了使用视听媒体的所有必需品。

更新：根据评论中的一些人的建议，与 Swift 2 ， Swift 3 和 Swift 4 兼容。

Update: Compatible with Swift 2, Swift 3 and Swift 4 as suggested by some of you in the comments.

---

Swift 2.3

---

Swift 2.3

import AVFoundation

var player: AVAudioPlayer?

func playSound() {
    let url = NSBundle.mainBundle().URLForResource("soundName", withExtension: "mp3")!

    do {
        player = try AVAudioPlayer(contentsOfURL: url)
        guard let player = player else { return }

        player.prepareToPlay()
        player.play()

    } catch let error as NSError {
        print(error.description)
    }
}

---

Swift 3

---

Swift 3

import AVFoundation

var player: AVAudioPlayer?

func playSound() {
    guard let url = Bundle.main.url(forResource: "soundName", withExtension: "mp3") else { return }

    do {
        try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
        try AVAudioSession.sharedInstance().setActive(true)

        let player = try AVAudioPlayer(contentsOf: url)

        player.play()

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

---

Swift 4（兼容iOS 11）

---

Swift 4 (iOS 11 compatible)

import AVFoundation

var player: AVAudioPlayer?

func playSound() {
    guard let url = Bundle.main.url(forResource: "soundName", withExtension: "mp3") else { return }

    do {
        try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
        try AVAudioSession.sharedInstance().setActive(true)



        /* The following line is required for the player to work on iOS 11. Change the file type accordingly*/
        player = try AVAudioPlayer(contentsOf: url, fileTypeHint: AVFileType.mp3.rawValue)

        /* iOS 10 and earlier require the following line:
        player = try AVAudioPlayer(contentsOf: url, fileTypeHint: AVFileTypeMPEGLayer3) */

        guard let player = player else { return }

        player.play()

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

确保更改tun的名称e以及扩展程序。
该文件需要正确导入（项目构建阶段> 复制捆绑资源）。您可能希望将它放在 assets.xcassets 中，以便更方便
。

Make sure to change the name of your tune as well as the extension. The file needs to be properly imported (Project Build Phases > Copy Bundle Resources). You might want to place it in assets.xcassets for greater convenience.

对于简短的声音文件，您可能希望使用非压缩音频格式，例如 .wav ，因为它们具有最佳质量和低cpu影响。对于短声音文件，较高的磁盘空间消耗不应该是一个大问题。文件越长，您可能想要使用压缩格式，例如 .mp3 等。检查 CoreAudio .com / library / content / documentation / MusicAudio / Conceptual / CoreAudioOverview / SupportedAudioFormatsMacOSX / SupportedAudioFormatsMacOSX.htmlrel =noreferrer>兼容音频格式 CoreAudio 。

For short sound files you might want to go for non-compressed audio formats such as .wav since they have the best quality and a low cpu impact. The higher disk-space consumption should not be a big deal for short sound files. The longer the files are, you might want to go for a compressed format such as .mp3 etc. pp. Check the compatible audio formats of CoreAudio.

有趣的事实：有一些简洁的小库可以播放声音更容易。 :)

例如： SwiftySound

Fun-fact: There are neat little libraries which make playing sounds even easier. :)
For example: SwiftySound

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