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iOS Object-Oriented Swift 2.0 Complex Data Structures Custom Initializers

Vasily Ponomarev
Vasily Ponomarev
731 Points

What is wrong?

I have no Idea what is 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, description: String) {
        self.red = 86.0
        self.green = 191.0
        self.blue = 131.0
        self.alpha = 1.0
        self.description = "red: \(self.red), green: \(self.green), blue: \(self.blue), alpha: \(self.alpha)"
    }
}

1 Answer

Martin Wildfeuer
PLUS
Martin Wildfeuer
Courses Plus Student 11,071 Points

Hey there! The idea is, that you can init multiple RGBColor objects with different color values. In your code, these values are hardcoded. Whatever parameters you pass to the initializer, you will always create objects with the same color values. To change this, just assign the parameters you passed to the intializer to the properties.

Moreover, you don't want to pass the description as a parameter, but let RGBColor take care of creating that description for you.

So, taking this into account, the struct might look like this:

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

Hope that helps :)