This is a tech test for touch surgery, following instructions here
The app is build using an MVVM-C architecture with RxSwift(/Cocoa) used for bindings between view and view model. Networking is done with URLSession abstracted behind a protocol, and models are represented as simple Decodable structs. Kingfisher is used for image caching
Built using Xcode 9.3 and Cocoapods 1.4.0
There are tests for most parts of the model layer, including view models, and Observable mapping helpers. No UI tests since I didn't have time, but the approach would be to create a mock DataProvider to be used when a UI test is active, which would return a specific set of data given a scenario (e.g. run a test with an empty response, or procedures with very long names)
I included Swiftlint to pick up any style issues, and Swiftgen is used to generate types instead of using key strings directly for localised strings (there are no assets here but it could be extended to do the same for UIImage creation)
There is no persistence here other than image caching, but I would approach this by adding a persistence stack (e.g a core data stack). This can be passed to a view model to use as an initial value. Then during the observable chain there would be a step to update the stack (i.e. persist the fetched data). This means the view model doesnt need to know much about how data is stored, just the types which can be saved, and the actual save work can be implemented as an Observable extension and tested elsewhere.