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iOS Object-Oriented Swift 2.0 Complex Data Structures Custom Initializers

Posted by nick f
nick f
1,165 Points

Not sure how to call the init/struct?

So I think the instance method is correct, I just don't how to call the init to get it to display the numbers i want '86.0,', '131',0', etc.... I hope that makes sense?

structs.swift 
struct RGBColor {
    let red: Double
    let green: Double
    let blue: Double
    let alpha: Double

    let description: String

    // Add your code below

    init(red: Double, green:Double, blue: Double, alpha: Double) {

         self.red = red
         self.green = green
         self.blue = blue
         self.alpha = alpha

        description = "red:\(red), green:\(green), blue:\(blue), alpha:\(alpha)"

    }
}
let colour = RGBColor.init(red: 86.0, green: 191.0, blue: 131.0, alpha: 1.0)

1 Answer

Greg Kaleka
Greg Kaleka
39,021 Points
Greg Kaleka
Greg Kaleka
39,021 Points

Hi Nick,

You're pretty close to getting this challenge right. There are two issues:

  1. In your init method, you need to set self.description, not just description
  2. Your string interpolation needs spaces in it between the colons and the values you're interpolating, so it yields "red: 86.0..." instead of "red:86.0..."

You don't need to create an instance of RGBColor, by the way.

One last point: when you do create an instance variable, you don't need to call init directly. Instead you would write:

let colour = RGBColor(red: 86.0, green: 191.0, blue: 131.0, alpha: 1.0)