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iOS Object-Oriented Swift Complex Data Structures Custom Initializers

Posted by Gustavo Creative
Gustavo Creative
2,070 Points

Initializer final question - why isnt this working??

I think I have done everything correctly in this test and I keep on getting make sure you are not using the member wise ...

What is wrong with my code?

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

1 Answer

David Papandrew
David Papandrew
8,386 Points

Hi Gustavo,

Two things: 1) Don't include description as an init parameter 2) Don't hardcode the color values in the init method. Instead you will assign the parameter values to the corresponding struct properties (the color variables).

Here's the code:

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)"
   }
}

Now if you want to create a RGBColor object (and print to see the description string), you can do this in Playgrounds:

let myRGBColor = RGBColor(red: 86.0, green: 191.0, blue: 131.0, alpha: 1.0)
print(myRGBColor.description)