Swift Quick Syntax Reference

Chapter    36

Class Type Properties

Type properties belong to a particular type, in contrast to the properties discussed in Chapter 34, which belong to instances of a type. You use type properties when you want to have properties that are universal to all instances of that type.

You use the class keyword to declare a type property for a class (see Listing 36-1).

Listing 36-1. Declaring Class Type Properties

class Person {    class var species:String{        return "Homo sapiens"    }    var name: String = "Name"    var age:Int = 0    func profile() -> String {        return "I'm \(self.name) and I'm \(self.age) years old."    }}

In Listing 36-1, you used the class keyword to define the type property species. Type properties for classes must ...