Hi. This looks like great work.
Do you know if any of the examples beyond the 1st one ("Hello World") are supposed to work as stand-alone complete examples. I get various different errors compiling each of them in Xcode. Maybe the idea is that the examples only work if you work through the tutorials in your book?
In particular, I was trying to get the xcode project for the shiny app to work, and it was missing files, e.g.,:
error: Build input file cannot be found: '~/Development/SwiftDensity/SwiftDensity/sexp-utils.swift' (in target 'shiny' from project 'shiny')
I tried copying sexp-utils.swift from an earlier example, but then the build failed. Ideally, I was just looking for a proof-of-concept...and if Shiny does indeed work well natively inside ios, then I would work through the whole book!
Anyways, thanks for your work thus far.