i have like 2 problems here , first i cant set NSURLSessionDownloadDelegate with a swift project, compiler says
Type 'ViewController' does not conform to protocol 'NSURLSessionDownloadDelegate'
Second problem is i cant find NSURLSession methods to download a simple file
here is the way i use to download the simple file
var url:NSURL = NSURL.URLWithString(fileURL)
var request:NSURLRequest = NSURLRequest(URL: url)
var downloadTask:NSURLSessionDownloadTask = sessionManager.downloadTaskWithRequest(request)
downloadTask.resume()
and these are the methods i want to make in swift
URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didWriteData:(int64_t)bytesWritten totalBytesWritten:(int64_t)totalBytesWritten totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite
..
URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didFinishDownloadingToURL:(NSURL *)location
..
URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error
.. if there is a new way to download files with NSURLSession i would like to know , and whats new in NSURLSession in swift
I am at the moment on a project with a background Download Manager, and here are a few things, how I solved that:
if you are using the NSURLSessionDownloadDelegate
you need to implement the following methods:
func URLSession(session: NSURLSession!, downloadTask: NSURLSessionDownloadTask!, didFinishDownloadingToURL location: NSURL!)
func URLSession(session: NSURLSession!, downloadTask: NSURLSessionDownloadTask!, didWriteData bytesWritten: Int64, totalBytesWritten: Int64, totalBytesExpectedToWrite: Int64)
func URLSession(session: NSURLSession!, downloadTask: NSURLSessionDownloadTask!, didFinishDownloadingToURL location: NSURL!)
I have done this with this call:
var session:NSURLSession!
var sessionConfiguration:NSURLSessionConfiguration = NSURLSessionConfiguration.backgroundSessionConfigurationWithIdentifier("com.company")
sessionConfiguration.HTTPMaximumConnectionsPerHost = 5
self.session = NSURLSession(configuration: sessionConfiguration, delegate: self, delegateQueue: nil)
// on download
var downloadTask:NSURLSessionDownloadTask = self.session.downloadTaskWithURL(NSURL.URLWithString("urlfromyourfile"))
downloadTask.resume()
// on error:
func URLSession(session: NSURLSession!, task: NSURLSessionTask!, didCompleteWithError error: NSError!) {
if(error != nil) {
println("Download completed with error: \(error.localizedDescription)");
} else {
println("Download finished successfully");
}
}
Here you find a good tutorial (i used lots of code from that tutorial and wrote it new with swift)