nsurlsessiondownloadtask

I want to display file download progress (how many bytes are received) of particular file. It works fine with the NSURLSessionDownloadTask .My question is I want to achieve the same with the NSURLSessionDataTask. Here is the code which receives file into NSData and writes to document folder: NSURLSessionConfiguration *defaultConfigObject = [NSURLSessionConfiguration defaultSessionConfiguration]; NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration: defaultConfigObject delegate: self delegateQueue: [NSOperationQueue mainQueue]]; NSURLSessionDataTask * dataTask = [defaultSession

I'm downloading a video thanks to downloadTaskWithURL and I'm saving it to my gallery with this code : func saveVideoBis(fileStringURL:String){ print("saveVideoBis"); let url = NSURL(string: fileStringURL); (NSURLSession.sharedSession().downloadTaskWithURL(url!) { (location:NSURL?, r:NSURLResponse?, e:NSError?) -> Void in let mgr = NSFileManager.defaultManager() let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0]; print(documentsPath); let destination = NSURL(string: NSString(format: "%@/%@", documentsPath, url!.lastPathComponent!) as String);

iOS 10 is going to be released soon so it worth to test applications for compatibility with it. During such test we've discovered that our app can't resume background downloads on iOS10. Code that worked well on previous versions does not work on new one, both on an emulator and on a device. Instead of reducing our code to minimal working test case I've searched internet for NSUrlSession tutorials and tested them. Behaviour is the same: resuming works on previos versions of iOS but breaks on 10th. Steps to Reproduce: Download a project form NSUrlSession tutorial https://www.raywenderlich.com