Swift 3: 从服务器流式传输 MP3 文件

Question

我正在尝试从 url 流式传输示例 mp3。这是一个非常小的示例文件。但是，当我按下播放按钮时，什么也没有发生。好吧，没有声音播放。

我是 Swift 的新手，也是一个菜鸟，所以这是完整的视图控制器，因为我不确定您可能需要什么。

    import UIKit
    import AVKit
    import AVFoundation
    import Foundation

    class ViewController: UIViewController {

        @IBAction func playButton(_ sender: Any) {

            print("pressed")
            let urlstring = "http://cdn.mos.musicradar.com/audio/samples/80s-heat-demos/AM_Eighties08_85-01.mp3"
            let url = NSURL(string: urlstring)
            print("the url = \(url!)")
            downloadFileFromURL(url: url!)

        }



        override func viewDidLoad() {
            // Do any additional setup after loading the view
        }



        func downloadFileFromURL(url:NSURL){
            weak var weakSelf = self
            var downloadTask:URLSessionDownloadTask
            downloadTask = URLSession.shared.downloadTask(with: url as URL, completionHandler: { (URL, response, error) -> Void in
            print("URL = \(URL)")
            weakSelf!.plays(url: URL! as URL)

            })

            downloadTask.resume()

        }



        func plays(url:URL) {

            print("playing \(url)")

            do {

                var playerItem = AVPlayerItem(url: url as URL)

                player = AVPlayer(url : url)

                player.volume = 1.0

                player.play()

            } catch let error as NSError {



                print(error.localizedDescription)

            } catch {

                print("AVAudioPlayer init failed")

            }

        }

    }

在我的控制台中，我得到了这个：

pressed

the url = http://cdn.mos.musicradar.com/audio/samples/80s-heat-demos/AM_Eighties08_85-01.mp3

URL = Optional(file:///private/var/mobile/Containers/Data/Application/C255E8F4-DDBA-43BB-BC33-AF71C08BBDFD/tmp/CFNetworkDownload_tm0O8v.tmp)

playing file:///private/var/mobile/Containers/Data/Application/C255E8F4-DDBA-43BB-BC33-AF71C08BBDFD/tmp/CFNetworkDownload_tm0O8v.tmp

URL = Optional(file:///private/var/mobile/Containers/Data/Application/C255E8F4-DDBA-43BB-BC33-AF71C08BBDFD/tmp/CFNetworkDownload_J1f2LF.tmp)

playing file:///private/var/mobile/Containers/Data/Application/C255E8F4-DDBA-43BB-BC33-AF71C08BBDFD/tmp/CFNetworkDownload_J1f2LF.tmp

谁能帮我解决这个问题？我只是希望能够通过单击服务器而非本地的按钮来播放此声音。

Answer 1

请尝试将此代码用于您的播放器功能。

func plays(url:URL) {

        print("playing \(url)")

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

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

            player.play()
        } catch let error as NSError {



            print(error.localizedDescription)

        } catch {

            print("AVAudioPlayer init failed")

        }

    }

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