如何使用Swift播放声音？

Question

我想用Swift播放声音。

我的代码在Swift 1.0中可用，但现在在Swift 2或更高版本中不再起作用。

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
  }
}

Answer 1

最可取的是，您可能想使用 AVFoundation。它提供了使用视听媒体的所有必要条件。

更新： 某些评论中建议与 Swift 2 ， Swift 3 和 Swift 4 兼容。

斯威夫特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)
    }
}

迅捷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（与iOS 13兼容）

import AVFoundation

var player: AVAudioPlayer?

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

    do {
        try AVAudioSession.sharedInstance().setCategory(.playback, mode: .default)            
        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)
    }
}

确保更改乐曲的名称以及 扩展名。
该文件需要正确导入（Project Build Phases> Copy Bundle Resources）。您可能希望将其放置在assets.xcassets更大的便利中。

对于短声音文件，您可能想要使用非压缩音频格式，例如，.wav因为它们具有最佳的质量和较低的cpu影响。对于短声音文件而言，较高的磁盘空间消耗不应该是大问题。较长的文件，你可能会想要去的压缩格式，如.mp3等页。检查兼容的音频格式的CoreAudio。

趣味： 整洁的小资料库使播放声音更加轻松。:)
例如：SwiftySound