I really don't need to say anything about this except this is playgrounds, for Objective-C, by Krzysztof Zabłocki. Check out the video too, super cool.
Details matter - Harnessing the power of CoreAnimation
Krzysztof Zabłocki with a great tutorial on reproducing the animations and interactions from the Stripe Checkout. There's not really any new techniques here but it's good to see it all put together.
Little things that can make your life easier in 2016
Let's start 2016 with a collection of small tips that are going to make your year that bit easier. Krzysztof Zabłocki has put together a collection of Xcode plugins, tips and hidden user preferences that'll take Xcode to 11. 🚀
Stop writing data parsing code in your Apps
I really like this property mapper class from Krzysztof Zabłocki. No subclassing, no dependencies just a simple data structure to describe mappings between dictionaries and properties. The problem being solved by this is not enormous but for the amount of times this kind of code gets written this is a worthwhile little helper.
Wouldn't it be nice if you could click on a log statement in the Xcode debug window and jump directly to the line that generated that output? Krzysztof Zabłocki has a plugin to do exactly that. There's also an accompanying blog post which describes the process of creating it.
This new library from Krzysztof Zabłocki is interesting. Define a Codable
struct, and it’ll use Sourcery behind the scenes to automatically generate a SwiftUI settings view. The best way to see it in action is to watch the intro video, so you should start there.
If your app deals with a lot of ever changing data, and let's face it that's most apps, then this technique from Krzysztof Zabłocki is going to be super useful to you. I really like the approach because it didn't need big architectural changes and it solves a real problem.