A few weeks ago I mentioned an easy to follow tutorial showing you how to create an Instagram style app using the UIImagePickerController and Core Image.
Here’s another tutorial in which you’ll build a similar style app, but you’ll go through the process of creating a PHP based backend with user authorization and use AFNetworking to connect to and handle the JSON responses. A great step-by-step guide that makes excellent use of the Xcode storyboard feature.
This tutorial has much less emphasis on UIImagePickerController and Core Image than the other tutorial so you might want to go through the other tutorial mentioned and go through this one to learn how to work with a backend service.
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