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iOS Object-Oriented Swift 2.0 Complex Data Structures Custom Initializers

Posted by Ray Hiera
Ray Hiera
1,870 Points

What value should I give to the description constant ??

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 = 86.0
self.green = 191.0
self.blue = 131.0
self.alpha = 1.0

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

}

}

structs.swift 
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 = 86.0
    self.green = 191.0
    self.blue = 131.0
    self.alpha = 1.0

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

    }


}

2 Answers

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

Hey there,

the only thing that's "wrong" in your description constant is the missing space between the colon after blue and its value. However the other problem is that you shouldn't hardcode the values in your initializer but you should give the stored properties the values that are passed in through the struct's initializer.

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, if you have further questions feel free to ask! :)

Ray Hiera
Ray Hiera
1,870 Points
Ray Hiera
Ray Hiera
1,870 Points

Thank you Tobias