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You had the right idea to use to encapsulate the variables and operations in a class object or struct, rather than using the global scope. It was not clear why this did not work for you. To make thin …

Optional chaining can be used to condense the check into a single line. Example: let name_cache = NSCache<NSString, NSString>() if let name = name_cache.object(forKey: "name") ?? (dictionary["name"] …

viewController.view view.addSubview(oneWayView) // Add constraints to position the oneWayView... } } On the other hand, if you prefer to stick to your original plans, you could use Swift …

Static constructors generally do lead to the problems you have encountered, where the implementation tends to be procedural, and complexity increases as the constructed classes become more intricate. …

My concern is that my TableViewDataSource is too tightly coupled with having to know about how my Conductor class functions, and I could like to decouple some of the logic. Create a protocol whic …

This is mostly a clean and well considered design. Some opportunities for improvement which stand out: Make the baseURL property a parameter of the initialiser for RestApiManager. This will allow you …

This is mostly correct. The reasoning for using delegates is that the class should inform its delegate, not instruct it. A symptom of this is that SoundAnalyser is formatting the text, which should be …

A slightly simpler approach would be to add an extension onto UIApplication itself, for executing a function in the background. Pros: No extra classes are needed. The callback syntax is simpler. Th …