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iOS Object-Oriented Swift 2.0 Complex Data Structures Custom Initializers

Wei Luo
Wei Luo
1,372 Points
Posted by Wei Luo
Wei Luo
1,372 Points

what is the problem of my code??

Don't know what the task want me to do..

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 = red
  self.green = green
  self.blue = blue
  self.alpha = alpha

  }
   let description = RGBColor(red: 847.0, green: 191.0, blue: 131.0, alpha: 1.0) // Add your code below
}

1 Answer

jcorum
jcorum
71,830 Points

Everything is fine up to where you create the initializer. You need to separate creating it from calling it.

Here's what the constructor should look like:

    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)"
    }

And here's how you would call it, and then use the computed property description:

let color = RGBColor(red: 23/255, green: 235/255, blue: 155/255, alpha: 0.8)
print(color.description)

In Xcode the last statement would display this:

red: 0.0901960784313725, green: 0.92156862745098, blue: 0.607843137254902, alpha: 0.8