Artur Gruchała

I started learning iOS development when Swift was introduced. Since then I've tried Xamarin, Flutter, and React Native. Nothing is better than native code:)

Keyframe animations in SwiftUI

2 years ago 2 min read SwiftUI Swift

SwiftUI is great. It is better year after year. Since iOS 15 is truly awesome but some of us have to work with the first version and support iOS 13. Apple keeps adding

Copy on Write in Swift explained with examples

2 years ago 3 min read Swift Foundation

Theory According to Wikipedia - Copy on Write "is a resource-management technique used in computer programming to efficiently implement a "duplicate" or "copy" operation on modifiable resources."

Testing async/await exceptions

3 years ago 2 min read Swift Testing Xcode

We all know how testing your code is important for stable releases and early bug detection. We should test happy paths, corner cases, and thrown errors. Old school Before async/await coroutines were

Bidirectional collection view with orthogonalScrollingBehavior

3 years ago 2 min read Swift UIKit

Before iOS 13, if you wanted to have a vertical collection view with horizontally scrolling sections it required embedding a scroll view inside the collection view cell, passing the model around, handling touch

The power of Compositional Layout

3 years ago 6 min read UIKit Swift

With iOS 13 Apple introduced a new and very powerful way of creating layouts for UICollectionView - UICollectionViewCompositionalLayout. The compositional layout uses three types of "building blocks": - item - describes