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iOS

jon kelson
jon kelson
5,149 Points
Posted by jon kelson
jon kelson
5,149 Points

RGBcolor

hi please could you tell me what im doing wrong

​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 self.description = "red: /(red), green: /(green), blue: /(blue), alpha: /(alpha)" }
}

jon kelson
jon kelson
5,149 Points
jon kelson
jon kelson
5,149 Points

sorry its all Squashed up

3 Answers

Tobias Helmrich
Tobias Helmrich
31,602 Points
Tobias Helmrich
Tobias Helmrich
31,602 Points

Hey Jon,

you almost got it right but there's only one tiny mistake: You have to interpolate the constants inside of the description String with a backslash instead of a forward slash like so:

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

I hope that helps! :)

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

I pasted it into Xcode and it looked good except for one very strange issue. struct didn't turn purple, like it should. So I deleted it and retyped it and it turned purple. Also, there were 4 typos. String interpolation is (...), not /(...):

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)"
    }
}

//if I remember correctly colors have to be fractions with divisors of 255
let color = RGBColor(red: 23/255, green: 235/255, blue: 155/255, alpha: 0.8)
color.description

This displays:

"red: 0.0901960784313725, green: 0.92156862745098, blue: 0.607843137254902, alpha: 0.8"
jon kelson
jon kelson
5,149 Points
jon kelson
jon kelson
5,149 Points

Ok thanks jcorum I'll try that later aswell . Many thanks

jon kelson
jon kelson
5,149 Points
jon kelson
jon kelson
5,149 Points

Ahh thanks Tobias I should know that by now !