Ios 如何从Swift file Manager播放音频文件？

我正在尝试播放我从S3下载的一个文件，在找到该文件并将URL传递给音频播放器后，音频文件将不会播放/丢失

这是完整的

文件URL

：

file:///var/mobile/Containers/Data/Application/61F2FC20-4C62-4263-B147-0010805BC0FA/Documents/Dump%20Trucks.mp3

这是我的密码：

    func playAudio(){
    
    var soundClip: AVAudioPlayer?
    
    if let directory = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.allDomainsMask, true).first{

        let path = NSURL(fileURLWithPath: directory).appendingPathComponent("Dump Trucks.mp3")

        print("The path is \(String(describing: path))")
        
        do {
            soundClip = try AVAudioPlayer(contentsOf: path!)
            soundClip?.play()
        } catch {
            print("Error: Audio File missing.")
        }
    }
}

---

问题是您的播放器是一个局部变量。因此，你的方法结束了，玩家在有机会开始玩之前就被摧毁了！将其声明为实例属性

所以

变成

var soundClip: AVAudioPlayer?
func playAudio(){

---

这可能无法解决您的所有问题，但如果您不这样做，您肯定永远听不到声音。

如果您想从设备播放音频，请使用

MPMediaItem

。它将从设备中检索所有音频。还有一件事我想知道，您将在这条线路中获得正确的路径//print（“路径是（字符串（描述：path））”）@RB's-是的，它打印/返回上述完整的文件URL。

var-soundClip:AVAudioPlayer？

使用

var-soundClip=AVAudioPlayer（）

更改此选项，您可以为Swift 4检查此解决方案+

import Foundation
import AVFoundation

final class MediaPlayer {
    static var player = AVAudioPlayer()

    class func play() {
        do {
            let file = Bundle.main.url(forResource: "file_name", withExtension: "mp3")!
            player = try AVAudioPlayer(contentsOf: file)
            player.numberOfLoops = 0 // loop count, set -1 for infinite
            player.volume = 1
            player.prepareToPlay()

            try AVAudioSession.sharedInstance().setCategory(.playback, mode: .default, options: [])
            try AVAudioSession.sharedInstance().setActive(true)

            player.play()
        } catch _ {
            print("catch")
        }
    }
}

import Foundation
import AVFoundation

final class MediaPlayer {
    static var player = AVAudioPlayer()

    class func play() {
        do {
            let file = Bundle.main.url(forResource: "file_name", withExtension: "mp3")!
            player = try AVAudioPlayer(contentsOf: file)
            player.numberOfLoops = 0 // loop count, set -1 for infinite
            player.volume = 1
            player.prepareToPlay()

            try AVAudioSession.sharedInstance().setCategory(.playback, mode: .default, options: [])
            try AVAudioSession.sharedInstance().setActive(true)

            player.play()
        } catch _ {
            print("catch")
        }
    }
}