我正在尝试将Alamofire4用于
Swift3.我需要下载.mp3文件并将它们保存到Documents目录.目前的代码是这样的：
func downloadAudioFromURL(url: String,completion: ((_ status: ResponseStatus,_ audioLocalURL: URL?) -> Void)?) {
let fileManager = FileManager.default
let directoryURL = fileManager.urls(for: .documentDirectory,in: .userDomainMask)[0]
let audioFullURL = String.ensureFullURLPath(url)
alamoManager.download(audioFullURL)
.validate { request,response,temporaryURL,destinationURL in
var pathComponent = response.suggestedFilename!
if pathComponent == "m4a.mp4" {
// Due to the old Android audio files without a filename
// Assign a unique name so audio files don't overwrite each other
pathComponent = "\(NSUUID().uuidString).mp4"
}
let localURL = directoryURL.appendingPathComponent(pathComponent)
if response.statusCode == 200 {
completion?(.success,localURL)
} else {
completion?(.failure,nil)
}
return .success
}
.responseJSON { response in
debugPrint(response)
print(response.temporaryURL)
print(response.destinationURL)
}
}
但是,保存后我无法实际访问localURL中的文件.我还注意到,对于我尝试下载的不同文件,localURL将完全相同(也许它们会被覆盖？).例如：file：/// Users / testuser / Library / Developer / CoreSimulator / Devices / D4254AEA-76DD-4F01-80AF-F1AF3BE8A204 / data / Containers / Data / Application / 29755154-DD21-4D4C-B340-6628607DC053 / Documents / file1 .MP3
我在这里做错了什么想法？
编辑我的代码看起来像这样：
func downloadAudioFromURL(url: String,_ audioLocalURL: URL?) -> Void)?) {
let destination: DownloadRequest.DownloadFileDestination = { _,_ in
var documentsURL = FileManager.default.urls(for: .documentDirectory,in: .userDomainMask)[0]
documentsURL.appendpathComponent("Audiofile.mp3")
return (documentsURL,[.removePrevIoUsFile])
}
Alamofire.download(url,to: destination).response { response in
if let localURL = response.destinationURL {
completion?(.success,localURL)
} else {
completion?(.failure,nil)
}
}
}
我怎么检查m4a.mp4呢？
解决方法
你为什么表演.validate？下载后,您不会在当前代码中存储任何数据.
Alamofire allows you to store a file directly after download:
Alamofire allows you to store a file directly after download:
let destination: DownloadRequest.DownloadFileDestination = { _,_ in
let documentsURL = FileManager.default.urls(for: .documentDirectory,in: .userDomainMask)[0]
let fileURL = documentsURL.appendpathComponent("pig.png")
return (fileURL,[.removePrevIoUsFile,.createIntermediateDirectories])
}
Alamofire.download(urlString,to: destination).response { response in
print(response)
if response.result.isSuccess,let imagePath = response.destinationURL?.path {
let image = UIImage(contentsOfFile: imagePath)
}
}
顺便提一下,您在下载方法中提供的下载路径是Documents目录的本地URL,而不是服务器的URL.