AVAudioPlayer 不工作。 swift2 中的错误域 = NSOSStatusErrorDomain 代码 = 1954115647 “（空）”
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【中文标题】AVAudioPlayer 不工作。 swift2 中的错误域 = NSOSStatusErrorDomain 代码 = 1954115647 “（空）”【英文标题】：AVAudioPlayer not working. Error Domain=NSOSStatusErrorDomain Code=1954115647 "(null)" in swift2 【发布时间】：2016-02-24 04:07:55 【问题描述】：我正在从服务器下载艺术作品、标题和音频数据文件，并能够显示在表格单元格中。
点击表格单元格中的播放按钮，将音频数据保存到本地文件，然后尝试从文档文件路径播放。音频未播放并在 AVAudioPlayer 出现错误。
搜索了很多，但到目前为止没有找到解决方案。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)"
【问题讨论】：
也许我给你看我的例子？ 你能分享我们的例子吗？ 知道为什么会出现错误：audioPlayer = try AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPath: savePath), fileTypeHint: AVFileTypeAppleM4A) 我更新了我的答案。我全班都给你写了。 尝试了 Alexsander 您的代码，但不起作用。 【参考方案1】：请试试这个代码。
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)")
【讨论】：
【参考方案2】：我的例子。我写了很长时间，所以代码很糟糕，但它可以工作
class PlayMusicVC: UIViewController, AVAudioPlayerDelegate, ADBannerViewDelegate
// MARK: - override functions
override func viewDidLoad()
super.viewDidLoad()
self.tabBarController?.tabBar.hidden = true
mpVolumeView()
play()
timer = NSTimer.scheduledTimerWithTimeInterval(1.0, target: self, selector: "timeForLabels", userInfo: nil, repeats: true)
bannerView.delegate = self
bannerView.hidden = true
override func didReceiveMemoryWarning()
super.didReceiveMemoryWarning()
override func viewDidAppear(animated: Bool)
super.viewDidAppear(animated)
self.tabBarController?.tabBar.hidden = true
self.becomeFirstResponder()
UIApplication.sharedApplication().beginReceivingRemoteControlEvents()
override func viewDidDisappear(animated: Bool)
super.viewDidDisappear(animated)
// timer.invalidate()
self.resignFirstResponder()
UIApplication.sharedApplication().endReceivingRemoteControlEvents()
override func canBecomeFirstResponder() -> Bool
return true
override func remoteControlReceivedWithEvent(event: UIEvent?)
if event!.type == UIEventType.RemoteControl
switch event!.subtype
case UIEventSubtype.RemoteControlPlay:
play()
case UIEventSubtype.RemoteControlPause:
pause()
case UIEventSubtype.RemoteControlNextTrack:
next()
case UIEventSubtype.RemoteControlPreviousTrack:
previous()
default: break
// MARK: - var and let
var timer: NSTimer!
var fileManager = NSFileManager.defaultManager()
// var (UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer = AVAudioPlayer()
var nameSongForLabel: String!
var artistSongForLabel: String!
var albumSongForLabel: String!
var dataImageForImageView: NSData!
// data from table
var currentIndex = Int()
var arrayOfSongs = [String]()
// MARK: - IBOutlet weak
@IBOutlet weak var nameSongLabel: UILabel!
@IBOutlet weak var imageOfArtwork: UIImageView!
@IBOutlet weak var durationView: UIView!
@IBOutlet weak var switchView: UIView!
@IBOutlet weak var volumeView: UIView!
// button
@IBOutlet weak var playPauseButton: UIButton!
// left and right labels
@IBOutlet weak var leftLabelTime: UILabel!
@IBOutlet weak var rightLabelTime: UILabel!
@IBOutlet weak var sliderDuration: UISlider!
// MARK: - ADBanner
@IBOutlet weak var bannerView: ADBannerView!
// MARK: - IBAction func and switch functions
@IBAction func previousTrack(sender: UIBarButtonItem)
previous()
var playingSong = true
@IBAction func playTrack(sender: UIBarButtonItem)
if playingSong == false /* true*/
play()
playingSong = true
controlCenter()
else
pause()
playingSong = false
controlCenter()
@IBAction func nextTrack(sender: UIBarButtonItem)
next()
@IBAction func sliderD(sender: UISlider)
(UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.currentTime = NSTimeInterval(sender.value)
controlCenter()
func previous()
maximumCount = false
// var allDigit = arrayOfSongs.count-1
if currentIndex > 0
newIndex = currentIndex-- - 1
play()
controlCenter()
// MARK: - data for control
var titleSongForControl: String!
var titleArtistForControl: String!
var currentPause: NSTimeInterval!
var imageForControlCenter: UIImage!
var maximumCount = false
func play()
playPauseButton.setImage(UIImage(named: "Pause32.png"), forState: UIControlState.Normal)
var currentSong: String!
if newIndex == nil
currentSong = arrayOfSongs[currentIndex]
if currentIndex == arrayOfSongs.endIndex-1
maximumCount = true
else
currentSong = arrayOfSongs[newIndex]
if newIndex == arrayOfSongs.endIndex-1
maximumCount = true
newIndex = nil
let directoryFolder = fileManager.URLsForDirectory(NSSearchPathDirectory.DocumentDirectory, inDomains: NSSearchPathDomainMask.UserDomainMask)
var superURL: NSURL!
let url: NSURL = directoryFolder.first!
superURL = url.URLByAppendingPathComponent(currentSong)
let playerItem = AVPlayerItem(URL: superURL)
let commonMetaData = playerItem.asset.commonMetadata
for item in commonMetaData
if item.commonKey == "title"
nameSongForLabel = item.stringValue
if item.commonKey == "artist"
artistSongForLabel = item.stringValue
if item.commonKey == "album"
albumSongForLabel = item.stringValue
if item.commonKey == "artwork"
dataImageForImageView = item.dataValue
titleSongForControl = nameSongForLabel
titleArtistForControl = artistSongForLabel
nameSongLabel.text = "\(artistSongForLabel) - \(nameSongForLabel)"
if dataImageForImageView != nil
imageOfArtwork.image = UIImage(data: dataImageForImageView)
imageForControlCenter = UIImage(data: dataImageForImageView)
else
imageOfArtwork.image = UIImage(named: "Notes100.png")
(UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer = try? AVAudioPlayer(contentsOfURL: superURL)
do
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
catch _
do
try AVAudioSession.sharedInstance().setActive(true)
catch _
if currentPause == nil
(UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.play()
controlCenter()
else
(UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.currentTime = currentPause
(UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.play()
currentPause = nil
func timeForLabels()
let timeForRightLabel: NSTimeInterval = (UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.duration - (UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.currentTime
let timeForLeftLabel = (UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.currentTime
let calendar: NSCalendarUnit = [NSCalendarUnit.Minute, NSCalendarUnit.Second]
// var time: NSTimeInterval = 0
let dateFormatter = NSDateComponentsFormatter()
dateFormatter.unitsStyle = NSDateComponentsFormatterUnitsStyle.Positional
dateFormatter.zeroFormattingBehavior = NSDateComponentsFormatterZeroFormattingBehavior.Pad
dateFormatter.allowedUnits = calendar
let timeRight = dateFormatter.stringFromTimeInterval(timeForRightLabel)!
rightLabelTime.text = "-\(timeRight)"
let timeLeft = dateFormatter.stringFromTimeInterval(timeForLeftLabel)!
leftLabelTime.text = timeLeft
sliderDuration.minimumValue = 0.0
sliderDuration.value = Float((UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.currentTime)
sliderDuration.maximumValue = Float((UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.duration)
// auto next sound
if rightLabelTime.text == "-0:00" && maximumCount == false
next()
//
if (UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.playing == false
playPauseButton.setImage(UIImage(named: "Play32.png"), forState: UIControlState.Normal)
playingSong = false
func pause()
playPauseButton.setImage(UIImage(named: "Play32.png"), forState: UIControlState.Normal)
do
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
catch _
do
try AVAudioSession.sharedInstance().setActive(true)
catch _
(UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.pause()
currentPause = (UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.currentTime
var newIndex: Int!
var newSong: String!
func next()
let allDigit = arrayOfSongs.count-1
if arrayOfSongs.count > 1
if currentIndex < allDigit
if newIndex == nil
newIndex = currentIndex++ + 1
else
newIndex = currentIndex++
play()
controlCenter()
else if currentIndex == arrayOfSongs.endIndex
(UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.stop()
func controlCenter()
let mpPlaysCenter = MPNowPlayingInfoCenter.defaultCenter()
mpPlaysCenter.nowPlayingInfo = [MPMediaItemPropertyArtist: titleArtistForControl, MPMediaItemPropertyTitle: titleSongForControl, MPMediaItemPropertyPlaybackDuration: (UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.duration, MPMediaItemPropertyPlayCount: (UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.currentTime, MPNowPlayingInfoPropertyElapsedPlaybackTime: (UIApplication.sharedApplication().delegate as! AppDelegate).mainAudioPlayer.currentTime]
// MARK: - swipe functions
@IBAction func leftSwipe(sender: UISwipeGestureRecognizer)
sender.direction = UISwipeGestureRecognizerDirection.Left
next()
@IBAction func rightSwipe(sender: UISwipeGestureRecognizer)
sender.direction = UISwipeGestureRecognizerDirection.Right
previous()
// MARK: - functions
func mpVolumeView()
let mpView = MPVolumeView(frame: CGRectMake(8, 15, self.view.bounds.size.width-16, self.volumeView.bounds.size.height))
volumeView.addSubview(mpView)
// MARK: - banner view function
func bannerView(banner: ADBannerView!, didFailToReceiveAdWithError error: NSError!)
NSLog("Banner error is %@", error)
func bannerViewDidLoadAd(banner: ADBannerView!)
bannerView.hidden = false
func bannerViewActionShouldBegin(banner: ADBannerView!, willLeaveApplication willLeave: Bool) -> Bool
return true
【讨论】：
我尝试了您的示例，但我的代码不起作用。我从代码中不明白的一件事是 - controlCenter() 是什么？ 不确定先生，问题出在哪里。你能建议我的代码中的问题在哪里吗？以上是关于AVAudioPlayer 不工作。 swift2 中的错误域 = NSOSStatusErrorDomain 代码 = 1954115647 “（空）”的主要内容，如果未能解决你的问题，请参考以下文章