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iOS Object-Oriented Swift Complex Data Structures Custom Initializers

Posted by Paul Holder
Paul Holder
2,155 Points

I am not quite sure how to assign initial values to the properties. Like in this example with numbers and strings.

I have tried everything I can think of to properly execute this challenge. I understood the video that went with it, but actually assigning values is giving me trouble.

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

  let description: String

  // Add your code below
  init(redValue: Double, greenValue: Double, blueValue: Double, alphaValue: Double, descriptionValue: String) {
        red = redValue
        green = greenValue
        blue = blueValue
        alpha = alphaValue
        description = "red: \(red), green: \(green), blue: \(blue), alpha: \(alpha)"
    }
}

2 Answers

Anusha Singh
PLUS
Anusha Singh
Courses Plus Student 22,106 Points
Anusha Singh
Anusha Singh
Courses Plus Student 22,106 Points

Hey Paul, you were almost correct except that you had to use self.(the colour) in the init function, and also mostly programmers write the name of the stored property itself for the init function(Don't add "value" in the parameters). Plus, you don't really need to add "description" in the parameter. Here's the code I used to pass the challenge. Hope it helped

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)"
    }
}
Paul Holder
Paul Holder
2,155 Points

Disregard the last comment. It worked! I appreciate it!!

Paul Holder
Paul Holder
2,155 Points
Paul Holder
Paul Holder
2,155 Points

I greatly appreciate the quick response! This makes sense. However, the challenge is still saying that it was unable to compile the code... Any ideas why this would happen?

Anusha Singh
Anusha Singh
Courses Plus Student 22,106 Points
Anusha Singh
Anusha Singh
Courses Plus Student 22,106 Points

Hi Paul, I re-submitted my code in the code challenge, if you noticed there was an extra comma in the parameters of the init function which was not needed, after I removed that comma, it worked. Sorry about that though. I hope my answer helped! Regards