Use AFNetworking instead of NSURLSession, thus we have iOS 6 support

[shkutkov]

Thank you for Haneke! It rocks!
But many apps are still support iOS 6, so it'll be great to have such support in Haneke. By using AFNetworking we can do it truly simple. What do you think?

[hpique]

Thanks @shkutkov!

As you mentioned making Haneke support iOS 6 is quite straightforward. The reason I didn't do it is because I developed Haneke for my iOS 7 apps.

What you did is great, and I like that you took the extra care to update the unit tests. Two caveats:

• Yesterday I committed code that adds image decompression using kCGImageSourceShouldCacheImmediately, which is iOS 7 only. For iOS 6 you could use the CGContextDrawBitmap method (example) or simply don't do anything and make hnk_decompressedImageWithData return:

[UIImage imageWithData:data scale:[UIScreen mainScreen].scale];

• Personally, I would prefer avoiding the AFNetworking dependency and instead use NSURLConnection when running on iOS 6. I use AFNetworking too but I prefer my pods to require as few dependencies as possible.

In any case, I will add a note in the readme for those who are looking for iOS 6, linking to your fork.

[nullproduction]

Thanks @shkutkov.
I think it will be useful

[shkutkov]

Thank you Hermes.

• I haven't seen your commit with kCGImageSourceShouldCacheImmediately yesterday. Personally I'd prefer to keep things simple and just have a stub in iOS 6.
• As for dependencies. I agree that avoiding dependency is a good decision, but it might take just a little bit more time and have an impact on code complexity.

Anyway, keep up the good work!

[hpique]

I'm closing the pull request as it won't be merged and the issue is now linked from the readme. Feel free to continue the conversation.