ASIHTTPRequest vs AFNetworking vs NSUrlRequest
NSURLRequest are the provided Cocoa classes for managing connections. In iOS 7, Apple added
But I think you'll find
AFNetworking to be a framework that further simplifies network requests (notably complex HTTP requests). If you don't want to use third-party frameworks for any reason, you can use
NSURLSession directly. It just takes a little more coding.
If you're looking for a good
AFNetworking is a great candidate.
For information on
NSURLSession see the URL Loading System Programming Guide.
NSURLRequest has been there since iOS2.0 (see the doc), so it is not precisely new.
ASIHTTPRequest has been discontinued, the last update was on 15th May 2011, so you shouldn't use it. AFNetworking is a delightful networking library for iOS and Mac OS X as described by them self, and really makes your live easier, in my case it is the first framework I include in my network required projects.
Which one you should use?, I think this depends on your requirements, with
NSURLConnection you can do everything, in fact AFNetworking us built on top of NSURLConnection. But how I tell you before, AFNetworking has my upvote.
EDIT post iOS7
EDIT for Swift
Take a look to the Alamofire project for an implementation done in Swift, it is also created by mattt (the main author of AFNetworking).
The asihttprequest is outdated library that doesn't support now for development. Do not use it.
the NSURLRequest is default iOS (cocoa) class to use. I recommend it for very little usage because you will need to write lots of code to handle connection responses.On top of it are build all http libraries.
The AFNetwoking is standart now for http, imho. It uses blocks for callbacks, it supports different types of data json, xml etc. it is well designed and can be easily subclassed. it is best.