Decouple Your Classes in Swift

The MVC Architecture in Swift: A Practical Example

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Before we start

Difficulty: Beginner | Easy | Normal | Challenging
This article has been developed using Xcode 12.1, and Swift 5.3

Prerequisites:

• You need to be able to create a new Swift project, and a Single View Application

Terminology

Coupling: The degree of interdependence between software modules and classes
protocol: A blueprint on methods, properties and requirements to suit a piece of functionality

Coupling

Coupling is the degree of interdependence between software modules, and how closely connected they are.

A low degree of coupling is seen as good design, since low coupling can assist with reuse as well as readability and maintainability.

Coupling Using a Segue for Navigation

If we are trying to move between View Controllers using a Storyboard, we might well use code that has prepare(for:sender) and use this to pass data to a DetailViewController.