Usage of CaseIterable in Swift Enum

Tue, 21 Jul 2020 22:04:00 -0700

Last Run on XCODE 11.6 / Swift 5.2

Definition Link to heading

CaseIterable is a protocol in Swift, that typically lets an enumeration to provide all of its cases as a collection.

Lets look at a simple example from my RoadRage car game. This is an enum type called TrafficType listing the cases of traffic/obstacle Sprites generated in my RoadRage car game.

enum TrafficType: UInt32 {
    case Police
    case Ambulance
    case FireTruck
    case Van
    case SportsCar
    case Taxi
}

In my game I would like to find out the total count of the TrafficType entities. I would also like the ability to randomly pick a traffic object from the list to keep generating obstacles during the game loop. And to achive that is as simple as conforming to the CaseIterable protocol in the enum.

Protocol on ZK Punk

Usage of CaseIterable in Swift Enum

Definition Link to heading