In the real world, at some point, we all have to deal with data that is fetched from a backend service, page by page. It's called paging. Everybody does this! Nothing to be ashamed of ;-) Here is one of the ways in which a Swift pattern (well, not specific to Swift, but visible in Swift) can be used to build a neat solution that allows me to fetch data in chunks and display it in the application.
Metron is a comprehensive collection of geometric functions and types that extend the 2D geometric primitives provided by CoreGraphics. Completely written in Swift, Metron allows you to express complex geometric calculations in very intuitive statements.