Swift 4 Recipes: Hundreds of Useful Hand-picked Code Snippets

© Yanis Zafirópulos 2019

Yanis ZafirópulosSwift 4 Recipeshttps://doi.org/10.1007/978-1-4842-4182-0_6

6. Classes and Closures

Yanis Zafirópulos¹ 

(1)

Granada, Spain

 

In this chapter, we’re going to explore two of the most powerful elements of the Swift language: classes and closures. Classes are a neat way to group functions together, along with data, and be able to create integrated objects with “state.” While closures provide us with a flexible way to use functions, without the usual function overhead – that is, defining them thoroughly, naming them, declaring their arguments, etc.

6.1 Define a basic class

Problem

We want to define a barebones class .

Solution

So, let’s start, by defining a new Person class.

class Person {

      // When a new instance is ...