使用 AVPlayer 播放下载到文件管理器的 mp3 文件
Play an mp3 file downloaded to filemanager using AVPlayer
我正在 swift3 开发一个项目，我有一个特定的 UIViewController 可以将 mp3 下载到我的文件管理器并使用保存的路径 我想使用 AVPlayer[播放 mp3 =18=]。我的代码不起作用，我想我遗漏了一些东西。我将如何实现这一目标？我将文件下载到文件管理器的代码如下
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()
}
}
}
保存该文件后，使用它的文件路径 "destinationUrl.path" 我在不同的 UIViewController 中启动我的播放器，如下所示。至于现在我已经硬编码了我保存的路径。代码如下。
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)
}
}
您可以使用下面的代码。我希望我能帮助你。首先你需要为你想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)
}
在您在 viewDidLoad 方法中创建这些之后。您可以为播放声音创建功能，例如；
func playSound() {
if btnSound.isPlaying {
btnSound.stop()
}
btnSound.play()
}
完成所有这些后，您就可以播放 swift 中的 mp3 文件了。
您的问题是 URL 设置为 AVPlayer。事实上，在 iOS 中硬编码路径是行不通的，它可以随时更改。
您需要按照与 destinationUrl 相同的方式使用代码：
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!)
.
.
.
}
正常情况下应该可以。希望对你有帮助。
我正在 swift3 开发一个项目，我有一个特定的 UIViewController 可以将 mp3 下载到我的文件管理器并使用保存的路径 我想使用 AVPlayer[播放 mp3 =18=]。我的代码不起作用，我想我遗漏了一些东西。我将如何实现这一目标？我将文件下载到文件管理器的代码如下
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()
}
}
}
保存该文件后，使用它的文件路径 "destinationUrl.path" 我在不同的 UIViewController 中启动我的播放器，如下所示。至于现在我已经硬编码了我保存的路径。代码如下。
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)
}
}
您可以使用下面的代码。我希望我能帮助你。首先你需要为你想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)
}
在您在 viewDidLoad 方法中创建这些之后。您可以为播放声音创建功能，例如；
func playSound() {
if btnSound.isPlaying {
btnSound.stop()
}
btnSound.play()
}
完成所有这些后，您就可以播放 swift 中的 mp3 文件了。
您的问题是 URL 设置为 AVPlayer。事实上，在 iOS 中硬编码路径是行不通的，它可以随时更改。
您需要按照与 destinationUrl 相同的方式使用代码：
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!)
.
.
.
}
正常情况下应该可以。希望对你有帮助。