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iOS Object-Oriented Swift 2.0 Complex Data Structures Custom Initializers

Gabriel Ducharme
Gabriel Ducharme
11,948 Points

Custom initializer method in swift.

Why do I keep getting the error message to create my own custom initializer in the test? Isn't it what I'm doing?

struct RGBColor {

    let red: Double
    let green: Double
    let blue: Double
    let alpha: Double

    let description: String

    // Add your code below

    init(r: Double, g: Double, b: Double, a: Double, description: String) {
        self.red = r
        self.green = g
        self.blue = b
        self.alpha = a
        self.description = "red: \(r), green: \(g), blue: \(b), alpha \(a)"


1 Answer

As you don't use the description parameter for creating a value for the description property, it is not necessary to declare it within the list of initializer parameters. The signature of the initializer should probably look like this:

init(r: Double, g: Double, b: Double, a: Double) {
    // Your initialization code goes here...