ios - NSURLConnection、NSURLSession 和 AFNetworking 有什么区别？

Question

<分区>

Answer 1

NSURLConnection、NSURLSession的区别

The entire model is different. NSURLSession is designed around the assumption that you'll have a lot of requests that need similar configuration (standard sets of headers, etc.), and makes life much easier if you do.

NSURLSession also provides support for background downloads, which make it possible to continue downloading resources while your app isn't running (or when it is in the background on iOS). For some use cases, this is also a major win.

NSURLSession also provide a grouping of related requests, making it easy to cancel all of the requests associated with a particular work unit, such as canceling all loads associated with loading a web page when the user closes the window or tab.

NSURLSession also provides nicer interfaces for requesting data using blocks, in that it allows you to combine them with delegate methods for doing custom authentication handling, redirect handling, etc., whereas with NSURLConnection if you suddenly realized you needed to do those things, you had to refactor your code to not use block-based callbacks.

NSURLConnection、NSURLSession 和 AFNetworking 的区别？

NSURLConnection and NSURLRequest are the provided Cocoa classes for managing connections. In iOS 7, Apple added NSURLSession.

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 NSURLConnection and/or NSURLSession directly. It just takes a little more coding.

For information on NSURLConnection and NSURLSession see the URL Loading System Programming Guide.

Find from reference1 and reference2

谢谢rob和 dgatwood对于这样一个惊人的答案...