NSURLSession download file content

 · Since iOS7, Apple engineers introduced a new set of networking API called NSURLSession, in order to help with downloading/uploading content via HTTP or HTTPS protocols. NSURLSession came with a lot of improved tasks which developers had to write a lot of code to handle. These tasks are: Manage downloads when the app is in a background bltadwin.ruted Reading Time: 9 mins. Creates a download task that retrieves the contents of a URL based on the specified URL request object, saves the results to a file, and calls a handler upon completion. func download Task (with Resume Data: Data) - URLSession Download Task.  · In iOS NSURLSession Example, I have explained how use NSURLSession API to make HTTP bltadwin.ruession class is introduced in iOS 7 and OS X vNSURLSession is replacement for NSURLConnection and this API gives your app the ability to perform background downloads when your app is in background.. Left images explains how NSURLConnection Works, .

The NSURLSession class and related classes provide an API for downloading content. This API provides a rich set of delegate methods for supporting authentication and gives your app the ability to perform background downloads when your app is not running or, in iOS, while your app is suspended. Downloading Data using NSURLSession in IOS using Objective-C. Whether an app retrieves application data from a server, updates your social media status or downloads remote files to disk, it's the HTTP network requests living at the heart of mobile applications that make the magic happen. NSURLSessionUploadTask: Opposite to the download task, this task is mainly used for sending files to the server. 2. How To Use NSURLSession To Implement Network Task. NSURLSession use tasks to implement network request, file download or file upload. One NSURLSession can have multiple task objects to do different tasks. But all the same session.

In iOS 7 and later, NSUrlSession and related classes are the preferred way to transfer larger files to and from the Web. NSUrlSession downloads can work when the application is in the background. Unlike regular tasks, background transfers are not constrained to 10 minutes, and instead will run until the transfer completes. NSURLSessionUploadTask: Opposite to the download task, this task is mainly used for sending files to the server. 2. How To Use NSURLSession To Implement Network Task. NSURLSession use tasks to implement network request, file download or file upload. One NSURLSession can have multiple task objects to do different tasks. But all the same session. Below topics are covered in this tutorial. 1).Session Types. 2).NSURLSession Task Delegates. 3).HTTP GET and POST with NSURLSessionDataTask. 4).File Download with NSURLSessionDownloadTask. 5).File Download when app is in background. 1). NSURLSession Session Types. NSURLSession has three types of Sessions.