我正试图从我用Alamofire下载的数据文件中播放mp3 . 这首歌很好，我可以用AVAudioPlayer播放（数据：数据） . 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 . 此外，我有歌曲路径的网址，但该URL无法以某种方式与AVPlayer一起使用 . 音乐只是没有播放 .
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()
}
}
1 回答
刚刚发现AVPlayerItem无法从指向数据文件的URL创建对象 . 例如，您需要具有文件扩展名为“.mp3”的URL . 当我将扩展名添加到路径下载和播放时，现在一切正常 .