audio - AVAudioPlayer 不工作。 swift2 中的错误域=NSOSStatusErrorDomain 代码=1954115647 "(null)"

Question

我正在从服务器下载插图、标题和音频数据文件，并能够在表格单元格中显示。

单击表格单元格中的播放按钮时，将音频数据保存到本地文件中，然后尝试从文档文件路径播放。音频未在 AVAudioPlayer 上播放并出现错误。

搜索了很多，但到目前为止还没有找到解决方案。您能否更正我的代码并帮助解决此问题。下面是我的代码。

class AudioViewController: UIViewController,UITableViewDataSource, UITableViewDelegate, AVAudioPlayerDelegate {

var audioPlayer: AVAudioPlayer?
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
    let myCell:AudioTableViewCell = tableView.dequeueReusableCellWithIdentifier("audioCell", forIndexPath: indexPath) as! AudioTableViewCell

    myCell.lblAudioTitle.text = arrDictAudios[indexPath.row]["title"] as? String

    let artworkData = arrDictAudios[indexPath.row]["artwork"] as? NSData
    myCell.imgArtwork.image = UIImage(data: artworkData!)

    myCell.btnOutletPlay.tag = indexPath.row
    myCell.btnOutletPlay.addTarget(self, action: "playButtonClicked:", forControlEvents: UIControlEvents.TouchUpInside)

    return myCell
}

func playButtonClicked(sender: AnyObject) {

    let buttonRow = sender.tag
    let buttonRowNSNumber = buttonRow as NSNumber

    let audioData = arrDictAudios[buttonRow]["data"] as? NSData
    print(audioData?.length)


    let audioFileNameWithExt = NSString(format: "/%@.m4a",buttonRowNSNumber.stringValue)
    var documentsDirectory:String?

    var paths:[AnyObject] = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)

    if paths.count > 0 {

        documentsDirectory = paths[0] as? String

        let savePath = documentsDirectory! + (audioFileNameWithExt as String)

        NSFileManager.defaultManager().createFileAtPath(savePath, contents: audioData, attributes: nil)

        print("savedPath %@", savePath)
/var/mobile/Containers/Data/Application/8A6AEAAE-B144-4EB2-A70C-99520A0AD9D3/Documents/1.m4a


        do {
            audioPlayer =   try AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPath: savePath), fileTypeHint: AVFileTypeAppleM4A)
            audioPlayer!.prepareToPlay()
            audioPlayer!.play()
        }
         catch let error as NSError{
            print(error.description)
//Error Domain=NSOSStatusErrorDomain Code=1954115647 "(null)"
        }

    }

}
}

Answer 1

请尝试此代码。

func play() {

    if let data = NSData(contentsOfURL: savePath) {
        do {
            try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, withOptions: .AllowBluetooth)
            try AVAudioSession.sharedInstance().setActive(true)
            audioPlayer =   try AVAudioPlayer(data: data, fileTypeHint: AVFileTypeAppleM4A)
            audioPlayer!.prepareToPlay()
            audioPlayer!.play()

        } catch let error as NSError {
            print("Unresolved error \(error.debugDescription)")
        }
    }
}