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iOS Object-Oriented Swift Complex Data Structures Custom Initializers

Posted by Raghav Sharma
Raghav Sharma
2,207 Points

Not compiling code

I have seen the code. It shows the desired output in the Xcode playground but in the treehouse portal, I added the code, and it does not show anything in the preview section but while checking it says to check the preview section for any compiler errors.

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

    let description: String

    // Add your code below
    init(redColor: Double, greenColor: Double, blueColor: Double, alphaColor: Double){
        red = redColor
        green = greenColor
        blue = blueColor
        alpha = alphaColor
        description = "red: \(redColor), green: \(greenColor), blue: \(blueColor), alpha: \(alphaColor)"
    }
}

3 Answers

Chris Stromberg
PLUS
Chris Stromberg
Courses Plus Student 13,389 Points
Chris Stromberg
Chris Stromberg
Courses Plus Student 13,389 Points

This is a very poorly worded challenge.

I could only get this challenge to work by submitting the code below.

 // 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)"
        }


}

let color = RGBColor(red: 86.0, green: 191.0, blue: 131.0, alpha: 1.0).description
Raghav Sharma
Raghav Sharma
2,207 Points

But the code I wrote is still correct right?

Chris Stromberg
PLUS
Chris Stromberg
Courses Plus Student 13,389 Points
Chris Stromberg
Chris Stromberg
Courses Plus Student 13,389 Points

Yes, but you need to finish the challenge and add the instance of RGBColor named "color".

Philipp Munzert
Philipp Munzert
11,793 Points
Philipp Munzert
Philipp Munzert
11,793 Points

Passed the challenge with this code for the custom initializer.

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)"
  }
Raghav Sharma
Raghav Sharma
2,207 Points

Yeah I get it why it was not working. I think the challenge was excepting for me to use the "self." keyword. Maybe that is why it did not work.