In this chapter, we developed a backend with the Swift Vapor library, which handles the Todo items POST, GET, and DELETE. Then, we developed a frontend iOS application that leverages functional programming, reactive programming, and State management techniques declaratively. We started by developing our Todo model in a functional style, and then we developed a Store object and its extensions to handle State storage, and Action to handle State changes. We defined and used Lens to modify our properties and a WebServiceManager with reflection techniques to request for backend resources.
In this case study, we were able to use value types such as struct and enum and avoid classes. In fact, the only four classes in this case study are related to the iOS SDK (UIViewController, UITableViewController, UITableViewCell, and UIView subclasses). We were able to centralize all State mutations into the Store...
