Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

iOS Object-Oriented Swift Complex Data Structures Custom Initializers

Aryaman Dhingra
Aryaman Dhingra
3,536 Points

String interpolation in Structs not working!! Please help!

I just want some clarification on how structs and init work. And also I would like to know where I am going wrong.

structs.swift
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
  }

  // Add your code below
  description = "red: \(self.red), green: \(self.green), blue: \(self.blue), alpha: \(self.alpha)"
}

1 Answer

Jeff McDivitt
Jeff McDivitt
23,970 Points

You need to initialize description

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)")


  }
}