Enumeration: "cannot be constructed because it has no accessible initializers"

Question

I can't initialize an enumeration using the rawValue initializer. Any thoughts? Error commented below:

//: Playground - noun: a place where people can play
// Xcode Version 7.3 (7D175)

import UIKit

enum Theme {
    case Default, Dark, Graphical
}

let possibleTheme = Theme(rawValue: 1) 
// Error: 'Theme' cannot be constructed because it has no accessible initializers.

Answer 1

enum Theme: Int {
    case Default, Dark, Graphical
}

let possibleTheme = Theme(rawValue: 1) // Dark

An enum doesn't have a raw value unless you specify its type. Possible raw value types are String, Character and any of the number types. Documentation