URLSession.ResponseDisposition.becomeDownload
Convert the response for this request to use a Urlsessiondownloadtask.
Declaration
case becomeDownloadDiscussion
When used with the completion handler from urlSession(_:dataTask:didReceive:completionHandler:), this disposition converts the data task to a download task. This will result in your delegate’s urlSession(_:dataTask:didBecome:) being called to provide you with the new download task that supersedes the current task.