如何在ios swift中播放来自URL的mp3音频

我正在获取mp3 url作为api调用的响应.我想播放那个音频,那我怎么能这样做呢？(ios swift)

这是我的回答

 {
    content = "En este primer programa se tratar\U00e1n asuntos tan importante como este y aquel sin descuidar un poco de todo lo dem\U00e1s";
    file = "http://radio.spainmedia.es/wp-content/uploads/2015/12/ogilvy.mp3";
    image = "http://radio.spainmedia.es/wp-content/uploads/2015/12/tapas.jpg";
    number = 0001;
    subtitle = Titulareando;
    title = "Tapa 1";
}

这是我的代码::

 @IBAction func btnplayaudio(sender: AnyObject) {
    let urlstring = "http://radio.spainmedia.es/wp-content/uploads/2015/12/tailtoddle_lo4.mp3"
    let url = NSURL(string: urlstring)
    print("the url = \(url!)")

    play(url!)

}

func play(url:NSURL) {
    print("playing \(url)")

    do {
        self.player = try AVAudioPlayer(contentsOfURL: url)
        player.prepareToPlay()
        player.volume = 1.0
        player.play()
    } catch let error as NSError {
        self.player = nil
        print(error.localizedDescription)
    } catch {
        print("AVAudioPlayer init failed")
    }

}

我哪里错了？

使用AVPlayer而不是AVAudioPlayer播放远程内容.根据文档,AVAudioPlayer需要mp3文件来播放音频.AVAudioPlayer不提供流媒体支持.

试试这个代码,它对我来说很好

func play(url:NSURL) {
    print("playing \(url)")

    do {

        let playerItem = AVPlayerItem(URL: url)

        self.player = try AVPlayer(playerItem:playerItem)
        player!.volume = 1.0
        player!.play()
    } catch let error as NSError {
        self.player = nil
        print(error.localizedDescription)
    } catch {
        print("AVAudioPlayer init failed")
    }
}

请记住在info.plist文件中设置App Transport Security(ATS).

NSAppTransportSecurity
    
        NSAllowsArbitraryLoads
        
    

我试过以下,

    let urlstring = "http://radio.spainmedia.es/wp-content/uploads/2015/12/tailtoddle_lo4.mp3"
    let url = NSURL(string: urlstring)
    print("the url = \(url!)")
    downloadFileFromURL(url!)

添加以下方法,

func downloadFileFromURL(url:NSURL){

    var downloadTask:NSURLSessionDownloadTask
    downloadTask = NSURLSession.sharedSession().downloadTaskWithURL(url, completionHandler: { [weak self](URL, response, error) -> Void in
        self?.play(URL)
    })

    downloadTask.resume()

}

而你的游戏方法就是这样,

func play(url:NSURL) {
    print("playing \(url)")

    do {
        self.player = try AVAudioPlayer(contentsOfURL: url)
        player.prepareToPlay()
        player.volume = 1.0
        player.play()
    } catch let error as NSError {
        //self.player = nil
        print(error.localizedDescription)
    } catch {
        print("AVAudioPlayer init failed")
    }

}

下载mp3文件,然后尝试播放它,不知何故,AVAudioPlayer不会为您下载您的mp3文件.我可以下载音频文件,玩家可以播放它.

请记住在info.plist中添加此内容,因为您从http源加载,并且您需要为iOS 9+设置以下内容

    NSAllowsArbitraryLoads
    

由于AVPlayer是非常有限的(例如你不能改变url那里没有再生整体AVPlayer我认为你应该使用AVQueuePlayer:

来自文档:

AVQueuePlayer是AVPlayer的子类,用于按顺序播放多个项目.使用此类,您可以创建和管理由本地或逐步下载的基于文件的媒体(如QuickTime电影或MP3音频文件)以及使用HTTP Live Streaming提供的媒体组成的播放器项目队列.

所以在Swift 3中它会像这样工作:

lazy var playerQueue : AVQueuePlayer = {
    return AVQueuePlayer()
}()

...

func playTrackOrPlaylist{
    if let url = track.streamURL() { //this is an URL fetch from somewhere. In this if you make sure that URL is valid
        let playerItem = AVPlayerItem.init(url: url)
        self.playerQueue.insert(playerItem, after: nil)
        self.playerQueue.play()
    }
}