使用mp3播放下载到filemanager的AVPlayer文件
使用mp3播放下载到filemanager的AVPlayer文件
提问于 2017-03-22 06:31:54
我正在swift3中做一个项目，我有一个特定的UIViewController下载一个mp3到我的文件分析器，并且使用这个路径保存了，我想使用AVPlayer播放一个mp3。我的代码不起作用，我想我遗漏了什么。我怎样才能做到这一点？我的下载文件的代码如下所示
func downloadSong() {
if let audioUrl = URL(string: "https://www.googleapis.com/download/storage/v1/b/feisty-beacon-159305.appspot.com/o/Aal%20Izz%20Well%20-%20Remix(MyMp3Song).mp3?generation=1490097740630162&alt=media") {
// then lets create your document folder url
let documentsDirectoryURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!//since it sys first this may only plays the first item
// destination file url
let destinationUrl = documentsDirectoryURL.appendingPathComponent(audioUrl.lastPathComponent)
print("destinationUrl is :",destinationUrl)
// to check if it exists before downloading it
if FileManager.default.fileExists(atPath: destinationUrl.path) {
print("The file already exists at path")
self.dest = destinationUrl.path
// if the file doesn't exist
} else {
// you can use NSURLSession.sharedSession to download the data asynchronously
URLSession.shared.downloadTask(with: audioUrl, completionHandler: { (location, response, error) -> Void in
guard let location = location, error == nil else { return }
do {
// after downloading your file you need to move it to your destination url
try FileManager.default.moveItem(at: location, to: destinationUrl)
print("file path is :",destinationUrl.path)
print("File moved to documents folder")
} catch let error as NSError {
print(error.localizedDescription)
}
}).resume()
}
}
}一旦我保存该文件，使用它的文件路径，即"destinationUrl.path“，我启动我的播放器在一个不同的UIViewController下面。就目前而言，我已经硬编码了我保存的路径。密码如下。
override func viewDidLoad() {
super.viewDidLoad()
//path I have saved in file manager is set to the url
let url = NSURL.fileURL(withPath:"/Users/auxenta/Library/Developer/CoreSimulator/Devices/F3840294-04AA-46BE-9E46-4342452AFB69/data/Containers/Data/Application/670C0EA1-B375-498E-8847-8707D391D7BF/Documents/Aal Izz Well - Remix(MyMp3Song).mp3") as NSURL
self.playerItem = AVPlayerItem(url: url as URL)
self.player=AVPlayer(playerItem: self.playerItem!)
let playerLayer=AVPlayerLayer(player: self.player!)
playerLayer.frame = CGRect(x: 0, y: 0, width: 10, height: 50) // actually this player layer is not visible
self.view.layer.addSublayer(playerLayer)
}
@IBAction func playBtnPressed(_ sender: Any) {
if player?.rate == 0 // this means if its not playing
{
player!.play()
print("playing")
playbutton.setImage(UIImage(named: "pausebutton"), for: UIControlState.normal)
//trackTime
trackTime()
} else {
// getFileFromFieManager()
print("pause")
player!.pause()
playbutton.setImage(UIImage(named: "playbutton"), for: UIControlState.normal)
}
}回答 2
Stack Overflow用户
回答已采纳
发布于 2017-03-22 09:00:17
您的问题是将URL设置为AVPlayer。实际上，在iOS中硬编码路径是行不通的，它可以在任何时候改变。
您需要以与destinationUrl相同的方式使用它：
if let audioUrl = URL(string: "https://www.googleapis.com/download/storage/v1/b/feisty-beacon-159305.appspot.com/o/Aal%20Izz%20Well%20-%20Remix(MyMp3Song).mp3?generation=1490097740630162&alt=media") {
let documentsDirectoryURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!//since it sys first this may only plays the first item
// destination file url
let destinationUrl = documentsDirectoryURL.appendingPathComponent(audioUrl.lastPathComponent)
print("destinationUrl is :",destinationUrl)
self.playerItem = AVPlayerItem(url: destinationUrl)
self.player=AVPlayer(playerItem: self.playerItem!)
let playerLayer=AVPlayerLayer(player: self.player!)
.
.
.
}正常情况下它应该能工作。希望能帮上忙。
Stack Overflow用户
发布于 2017-03-22 06:54:01
您可以在下面使用代码。希望我能帮到你。首先，您需要为要播放的源文件创建路径。
let path = Bundle.main.path(forResource: "yourFileName", ofType: "mp3")
let soundUrl = URL(fileURLWithPath: path!)
do{
try btnSound = AVAudioPlayer(contentsOf: soundUrl)
btnSound.prepareToPlay()
}
catch let err as NSError{
print(err.debugDescription)
}在viewDidLoad方法中创建这些代码之后。您可以创建功能，为播放的声音类似；
func playSound() {
if btnSound.isPlaying {
btnSound.stop()
}
btnSound.play()
}在所有这些之后，您可以快速地播放mp3文件。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/42944294
复制相关文章
相似问题
腾讯云开发者
