我正在尝试使用Alamofire从下载的数据文件中播放mp3。这首歌很好,我可以使用AVAudioPlayer(data: Data)来播放它。我应该如何使用AVPlayer播放相同的数据文件?我找不到如何从Data创建PlayerItem或从Data创建AVAsset的方法。
此外,我有歌曲路径的URL,但该URL与AVPlayer无法正常工作。音乐根本没有播放。
func startSong(withIndex: Int) {
if let item = getItem(atIndex: withIndex) {
do {
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
print("AVAudioSession Category Playback OK")
do {
try AVAudioSession.sharedInstance().setActive(true)
print("AVAudioSession is Active")
} catch let error as NSError {
print(error.localizedDescription)
}
let playerItem = item
self.player = AVPlayer(playerItem: playerItem)
} catch let error as NSError {
print(error.localizedDescription)
}
}
}
func getItem(atIndex: Int) -> AVPlayerItem? {
var item: AVPlayerItem
var url: URL
let song = playlist.getSong(index: atIndex)
if PlaylistsService.sharedService.isFileDownloaded(inPath: SongPath.Offline(id: (song?.getID())!).path()) {
url = URL(fileURLWithPath: SongPath.Offline(id: (song?.getID())!).path())
} else if PlaylistsService.sharedService.isFileDownloaded(inPath: SongPath.Temp(id: (song?.getID())!).path()) {
url = URL(fileURLWithPath: SongPath.Temp(id: (song?.getID())!).path())
} else {
self.downloadSong(song: song!)
url = URL(fileURLWithPath: SongPath.Temp(id: (song?.getID())!).path())
}
item = AVPlayerItem(url: url)
return item
}
@IBAction func playPause(_ sender: UIButton) {
sender.isSelected = !sender.isSelected
if sender.isSelected {
print("Play")
self.player.play()
} else {
print("Pause")
self.player.pause()
}
}
self.player.play()
上设置一个断点。那行代码是否真正执行了? - mattself.player.play()
的那个点上,你可以尝试记录一些有关播放器状态的进一步信息。它的currentTime
是多少?它的currentItem
是什么?如果它有一个项目,那么该项目的status
是什么?该项目的asset
是什么? - matt