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iOS Object-Oriented Swift 2.0 Complex Data Structures Custom Initializers

Posted by Steve Burgos
Steve Burgos
2,759 Points

I am stuck with how to add the value string to the description item.

I am having trouble understanding where to start on getting the values for the description item to the corresponding colors.

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

    let description: String

   init (red: 86,0, green: 191.00, blue: 131.00, alpha: 1.0) {

    self.red = red
    self.green = green
    self.blue = blue
    self.alpha = alpha


    } 
}

1 Answer

jcorum
jcorum
71,830 Points

Good start. But you don't put values in as parameters for the initializer. They will be passed in when you call the initializer, i.e., when you use the initializer to create RGBColor objects. You wouldn't want every color object to have the same red, green and blue values.

    init(red: Double, green: Double, blue: Double, alpha: Double) {
        self.red = red
        self.green = green
        self.blue = blue
        self.alpha = alpha
        description = "red: \(red), green: \(green), blue: \(blue), alpha: \(alpha)"
    }