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iOS Object-Oriented Swift 2.0 Complex Data Structures Custom Initializers

Posted by Alex Nelsen
Alex Nelsen
Courses Plus Student 2,977 Points

I need help solving this custom initializer problem.

It appears that I have no errors in my coding, but this does not satisfy the problem. Any help here would be appreciated.

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"; "green"; "blue"; "alpha"
       }
}

1 Answer

Steven Deutsch
Steven Deutsch
21,046 Points
Steven Deutsch
Steven Deutsch
21,046 Points

Hey Alex Nelsen,

You have your initializer set up properly, however, you are not assigning the right values inside of it. First, you should be using the parameter names associated with the values you are passing into the initializer to set the values of your RGBColor struct. Second, for the description property you want to initialize it to a string using the red, green, blue, and alpha values passed into the initializer. You can do this by using string interpolation with the parameter names.

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)"
    }
}

Good Luck!

Tyler Renfro
Tyler Renfro
15,190 Points

How is this returning "red: 86.0, green: 191.0, blue: 131.0, alpha: 1.0"?

Steven Deutsch
Steven Deutsch
21,046 Points

Hey Tyler,

You would pass in those values when you use the initializer. I don't think the challenge wants you to initialize with those specific values. I think it is just using them as an example to display what your initializer should look like.