Swift Language Variables & Properties Type Properties
Example
Type properties are properties on the type itself, not on the instance. They can be both stored or computed properties. You declare a type property with static:
struct Dog {
static var noise = "Bark!"
}
print(Dog.noise) // Prints "Bark!"
In a class, you can use the class keyword instead of static to make it overridable. However, you can only apply this on computed properties:
class Animal {
class var noise: String {
return "Animal noise!"
}
}
class Pig: Animal {
override class var noise: String {
return "Oink oink!"
}
}
This is used often with the singleton pattern.
