如何在swift 3.0中编写以下代码段？以下语法在swift 2中
Alamofire.download(.POST,invoice.url,parameters:params,destination: { (url,response) -> NSURL in
let pathComponent = response.suggestedFilename
let fileManager = NSFileManager.defaultManager()
let directoryURL = fileManager.URLsForDirectory(.DocumentDirectory,inDomains: .UserDomainMask)[0]
let fileUrl = directoryURL.URLByAppendingPathComponent(pathComponent)
return fileUrl
})
.progress { bytesRead,totalBytesRead,totalBytesExpectedToRead in
print(totalBytesRead)
dispatch_async(dispatch_get_main_queue()) {
let progress = Double(totalBytesRead) / Double(totalBytesExpectedToRead)
completionHandler(progress,nil)
}
}
.responseString { response in
print(response.result.error)
completionHandler(nil,response.result.error)
}
在Swift 3中它就是这样的.
原文链接：https://www.f2er.com/swift/319948.htmllet parameters: Parameters = ["foo": "bar"]
let destination: DownloadRequest.DownloadFileDestination = { _,_ in
let pathComponent = "yourfileName"
let documentsURL = FileManager.default.urls(for: .documentDirectory,in: .userDomainMask)[0]
let fileURL = documentsURL.appendPathComponent(pathComponent)
return (fileURL,[.removePrevIoUsFile,.createIntermediateDirectories])
}
Alamofire.download(urlString,method: .get,parameters: parameters,encoding: JSONEncoding.default,to: destination)
.downloadProgress(queue: DispatchQueue.global(qos: .utility)) { progress in
print("Progress: \(progress.fractionCompleted)")
}
.validate { request,response,temporaryURL,destinationURL in
// Custom evaluation closure now includes file URLs (allows you to parse out error messages if necessary)
return .success
}
.responseJSON { response in
debugPrint(response)
print(response.temporaryURL)
print(response.destinationURL)
}
有关详细信息,请查看Alamofire Documentation或Alamofire 4.0 Migration Guide.
