Hi! I'm Arkadiusz Holko, a software developer from Poland. Most recently I've created Outread for iOS.

Improving Immutable Object Initialization in Objective-C

Much has been written and said about advantages of using completely immutable objects. For the past few months I’ve been making sure that as many parts as possible of systems I build are immutable. When doing that I’ve noticed that creation of immutable objects can become cumbersome, so I set out to improve it. You can find the outcome of my thinking in a small library called AHKBuilder. Read on to learn whys and hows behind this library.

Read more →

Compile-time checked switch statements in Objective-C

Thanks to its design Swift can catch more issues at compile-time than Objective-C. Some similar checks can be performed in Objective-C too, although they’re not well-known and sometimes tricky. In this post I’ll describe how to get as much help as possible from the compiler when it comes to switch statements.

Read more →

Motion Blur

Motion blur is the artefact by which fast-moving objects appear blurred. It’s been present in movies, photographs and video games for many years now. I haven’t seen it used in any real-world user interfaces yet, though some designers have utilized it in prototypes, for example YW_Z in his Pocket animation:

Read more →

Hamburger Button Animation

Last week I wrote about Google’s Authentic Motion. The post was kind of dry, though, so I decided to use the derived timing function to implement one of Android’s new animations. A hamburger button transition seems to be fitting iOS design language1 and that’s what I’ve chosen to recreate. It may become a good alternative to another recently introduced transition.

Read more →

Bringing Google's Authentic Motion to iOS via Bézier Curve Fitting

During this year’s I/O conference Google showed that it cares about the design. While browsing through its website, I noticed an interesting approach to animations called Authentic Motion. Google’s designers created a new animation curve called Swift Out and described it as:

Motion with swift acceleration and gentle deceleration feels natural and delightful.

Read more →