Most of the apps you'll build will have to fetch some sort of data through the network whether it's as simple as high scores, a configuration file or more complex data such as a large movie catalogue. UPDATE: Apparently on iOS5 the problem is the "Chunked-Encoding", When sending without that everything works. Seems on server that for some reason on iOS5 the transfer never ends (on iOS 6 everyt You can read video details from the following link: NSURLConnection basics for iOS In this post am going to describe about NSURLConnection Many free tutorials are in Google to guide you in iOSiOS Programming Recipe 4: Using NSURLConnection. Excellent tutorial about NSURLConnection! Thanks! Reply. iOS5; iOS 6; iOS 7; iOS 8; Objective-C; iOSTutorial - Part 27 - (NSURLConnection) I - Duration: iOS5 - Simple JSON Web objc.io publishes books on advanced techniques and practices for iOS and OS From NSURLConnection to NSURLSession. In iOS5, NSURLConnection added the method NSURLProtocol is the lesser known heart of the URL handling system in iOS. In this NSURLProtocol tutorial nothing about NSURLProtocol is specific to NSURLConnection. Downloading Data using NSURLConnection in IOS using Objective-C. There are several cases when you need to download an image from a specific url, so it is better that you know how to do it easily and effectively. iOS 7 Tutorial Series: For comparison’s sake, the snippet below is a short implementation that represents how an iOS 6 application would use NSURLConnection.