The Builder Design Pattern in Swift

Make it this way

Photo by Callum Hill on Unsplash

Difficulty: Beginner | Easy | Normal | Challenging

This article has been developed using Xcode 11.5, and Swift 5.2.4

Prerequisites:

• You will be expected to be aware of how to make a Single View Application in Swift.

Terminology:

Design Pattern: a general, reusable solution to a commonly occurring problem

The Builder Pattern in Swift

The builder pattern creates complex objects step by step, and the name brings to mind an assembly line where we are creating a complex object operation by operation.

This avoids creating initializers that grow the hierarchy into a considerable number of subclasses, or creating a giant constructor that has many parameters — and neither makes for a great code review!

The detail

The builder constructs objects in a stepwise fashion. This is great and helps avoid massive constructors!

This means

• reusability is enhanced since the same code can be used in various representations of objects
• The Single Responsibility Principle is followed, as complex construction…