Swift Quick Syntax Reference

Chapter    30

Structures

You can use structures to define custom types in Swift. Structures give you a way of grouping related information together. These Swift constructs give you the same capability as structures in C programming, but as you will see, Swift structures are richer than C structures.

To define a Swift structure, use the struct keyword (see Listing 30-1).

Listing 30-1. Defining Custom Types

struct Rectangle {    var x:Int = 0    var y:Int = 0    var width:Int = 0    var height:Int = 0}

In Listing 30-1, you define a structure named Rectangle. Your rectangle type is made of integers that describe the rectangle, including the x and y origin coordinates and the height and width dimensions.

When used like this in structures and classes ...