Swift enum random value - I need to pick a random value from an enum that holds color values

Question

I have a enum that i am trying to pull a random color from to color a shape object.
enum Color {
    case Blue, Green, Black, Orange, Yellow, Red, Purple
}
I've read a little about arc4random_uniform but I don't know how to make it work. Eventually I'd like to assign a random color to a class that creates a shape. Maybe there is an easier way to do it?

Daniel Santos · Answer

Hi there,
There is an easier way to get a random number. Again I will show you how to get the number, but after that, you my have to process a little bit. Remember that IUColor takes number from 0.0 to 1.0.
So if you want, for example, R: 200, G: 150 B: 30
You will have to divide each number by 255.0.
Here is the snippet to get the random number:
```swift
import GameKit
// This will generate a number from 0-4
let newNum: Int = GKRandomSource.sharedRandom().nextIntWithUpperBound(5) 
```
If you want number from 1 to 5 you just do:
```swift
import GameKit
// This will generate a number from 1-5
let newNum: Int = GKRandomSource.sharedRandom().nextIntWithUpperBound(5) + 1
```
If you have more question, please comment.
I hope this help,
-Dan

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Brennan Altringer

Brennan Altringer

Swift enum random value - I need to pick a random value from an enum that holds color values

1 Answer

Daniel Santos

Daniel Santos