Using Type-Safe Identifiers in Swift

Nicely does it

Photo by Agung Raharja on Unsplash

Before we start

Difficulty: Beginner | Easy | **Normal** | Challenging

This article has been developed using Xcode 12.4, and Swift 5.3.2

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Prerequisites:

• You will be expected to be aware how to make a Single View Application would be useful

Why

You need to uniquely identify both values and objects — and this is often brought into focus when you are using Core Data in your project.

If you want to keep track of instances of your value types, you can use an `Identifier` in much the same way that you might use ObjectIdentifier for class-types (well, objects).

You may well be able to do this through UUID, but using your own Identifier gives you more flexibility, and allows you to make your code type-safe which may well be particularly important when using databases (for example CoreData abstractions).