Properties in Swift

The values you use every day

Properties are the association of a value with a class, struct or enum. But it can be quite confusing to the beginner that we can have stored or computed properties, and that they can even be lazy.

The idea of this particular tutorial is to make these terms slightly easier to understand, and provide a nice reference.

Photo by Kate Stone Matheson on Unsplash

Difficulty: Beginner | Easy | Normal | Challenging

Prerequisites:

• Be able to produce a “Hello, World!” iOS application (guide HERE)
• Understand the difference between a class and a struct (tutorial HERE)

Terminology

Computed Property: A value that is computed (rather than set)

Property: An association of a value with a class, structure or enumeration

Stored Property: A constant or variable that is stored as part of a class or a struct

Value: A possible result of an implementation

Properties

A rectangle can be represented by the following struct: