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iOS Object-Oriented Swift Complex Data Structures Custom Initializers

Nikolas Tamvakis
Nikolas Tamvakis
2,281 Points
Posted by Nikolas Tamvakis
Nikolas Tamvakis
2,281 Points

Using the values assigned to those properties create a value for the description property

I am not sure what I am doing wrong. When I try this, it tells me I cannot use "red" within the property initializer so I think that the way I have it uses "description" as a parameter but I am not sure how to keep it from doing that (or if that is even what I need to do). Please give me some advice.

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

  let description: String

  // Add your code below
}
*/

struct RGBColor {
    let red: Double
    let green: Double
    let blue: Double
    let alpha: Double

    init(red: Double, green: Double, blue: Double, alpha: Double){
        self.red = red
        self.green = green
        self.blue = blue
        self.alpha = alpha
    }

    let description: String = "red: \(red), green:\(green), blue:\(blue), alpha:\(alpha)"
}
eh wah
eh wah
2,280 Points
eh wah
eh wah
2,280 Points

I have the same problem

eh wah
eh wah
2,280 Points
eh wah
eh wah
2,280 Points

this is one of correct answer from Dhanish Gajjar, and I still don't really understand it

    struct RGBColor {
    let red: Double
    let green: Double
    let blue: Double
    let alpha: Double

    let description: String

    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)"
    }


}
let newColor = RGBColor(red: 86.0, green: 191.0, blue: 131.0, alpha: 1.0)
newColor.description
          ```

1 Answer

Hurkan Dogan
Hurkan Dogan
8,099 Points
Hurkan Dogan
Hurkan Dogan
8,099 Points

You don't need to add a new value named newColor. Delete the bottom two lines and you have the correct answer.

Hurkan Dogan
Hurkan Dogan
8,099 Points
Hurkan Dogan
Hurkan Dogan
8,099 Points 
struct RGBColor {
  let red: Double
  let green: Double
  let blue: Double
  let alpha: Double

  let description: String

  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)"
  } 
}