getting this error when setting up a custom init: Make sure you're using string interpolation to construct the correct

Question

struct RGBColor { let red: Double let green: Double let blue: Double let alpha: Double

let description: String

// Add your code below
init custom (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)"


}

}

structs.swift

struct RGBColor {
    let red: Double
    let green: Double
    let blue: Double
    let alpha: Double

    let description: String

    // Add your code below
    init custom(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)"


    }
}

Answer 1 · 2018-10-31T00:23:45Z

October 31, 2018 12:23am

1) The word "custom" isn't a special keyword in swift. Treehouse is just telling you to write your own initializer method, as structs come with one by default behind the scenes.

2) We don't need to pass in a description parameter. The description is composed from the other values, it's not passed in separately.

3) We want to set the values on self from the parameters that get passed into the init method. Right now you're hard-coding in the numbers 86.0, 191.0, etc. These were just examples of some numbers that might get passed in, but they could be any numbers.

Let me know if you're still having trouble.

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Aaron Haughton

Aaron Haughton

getting this error when setting up a custom init: Make sure you're using string interpolation to construct the correct

1 Answer

Brendan Whiting

Brendan Whiting