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Author of Sloth here. The controller didn't start out quite so fat, the whole thing was quite slim, 400-500 lines, when I first put Sloth together some 15 years ago. It grew as various additional features piled on over the years. However, your point is well taken. I should refactor things at some point.

This[1] video with Andy Matuschak helps with refactoring these “Mega” controllers. This[2] article also is good when it comes to breaking down controllers into smaller pieces.

I will admit it’s a hard problem for me. Putting everything into one view controller is so easy and makes certain problems go away. e.g. Storyboards are a lot easier to deal with when their outlets are in the massive view controller. Custom UIviews with storyboards are a huge pain to get working with interface builder.

[1] https://academy.realm.io/posts/andy-matuschak-refactor-mega-... [2] https://www.smashingmagazine.com/2016/05/better-architecture...

The code is pretty clear though. It is well laid out and doesn't feel cluttered.