I’m an iOS Engineer at Triumph Labs, where I develop TriumphSDK for game devs. Not so long ago, I got a task to completely reimplement UI and animations. One of the most interesting parts was implementing of balance view with rolling animation of the number in it.

At the first sight, it looks pretty simple, but we needed a well-configured custom solution. Of course, I checked existing libraries that I could reuse and adjust this kind of animation for our needs. After the first try, I figured out that the libraries are not so adjustable, and we cannot control the animation of each number. I won’t go into details too much. However, I decided to make my own solution from scratch.

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