This blog post describes how JSON objects can be stored, serialized and deserialized using CoreData.
The AVFoundation framework offers a pretty good way to scan codes with the device camera, such as qr codes or barcodes. This blog post gives an implementation of doing such code scanning.
I have worked once on a ViewController that should support drag & drop of a child ViewController with a certain amount of fixed sheet states. I want to share how such a feature can be implemented.
This article is part 7 of my UIKit Cheatsheet series. It deals with loading indicators.
This article is part 6 of my UIKit Cheatsheet series. It deals with adaptive view heights.
This article is part 5 of my UIKit Cheatsheet series. It deals with different presentation modes for ViewControllers.