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iOS Object-Oriented Swift 2.0 Complex Data Structures Custom Initializers

Posted by Ben Forrester
Ben Forrester
Courses Plus Student 5,357 Points

Need help

I am stumped with this challenge and need help. Can someone please contact me to discuss? thanks

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

    let description: String

    // Add your code below
}

1 Answer

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points 
    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)"
    }

self.red = red means my red (i.e., the stored property) should be assigned the red value being passed to the initializer.

E.g., if you call the initializer like this:

let color = RGBColor(24, 36, 255, 0)

then the struct's stored property red will have the value 24.

description doesn't need self because it's a calculated property. It's String value is made up from the other, passed in, values, and uses String interpolation to combine them all into a String.

Happy coding!