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iOS Object-Oriented Swift Complex Data Structures Custom Initializers

Posted by Swift Basic
Swift Basic
108 Points

I am not clear with init and self concepts.

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

let description: String

init() {
    red = 86.0
    green = 191.0
    blue = 131.0
    alpha = 1.0
    description = "red: \(red), green: \(green), blue: \(blue), alpha: \(alpha)"

}

}

var color = RGBColor()

This is what the code I have written, do I have to make any changes

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

    let description: String

    init() {
        red = 86.0
        green = 191.0
        blue = 131.0
        alpha = 1.0
        description = "red: \(red), green: \(green), blue: \(blue), alpha: \(alpha)"

    }
}

1 Answer

Marlon Henry
Marlon Henry
6,885 Points

Doing it this way will work, BUT you lose the dynamic nature of the code, the values are stored and will always be that way since you have them in the init, and also they are constants so you can't change them ever.

Try this out:

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

    let description: String

    init(colorForRed:Double,colorForGreen:Double,colorForBlue:Double,cantForgetAlpha:Double) {
        self.red = colorForRed
        self.green = colorForGreen
        self.blue = colorForBlue
        self.alpha = cantForgetAlpha
        description = "red: \(red), green: \(green), blue: \(blue), alpha: \(alpha)"

    }
}

You can change the value all you want now.

Swift Basic
Swift Basic
108 Points

Thank you so much. I even understood the concept.

Marlon Henry
Marlon Henry
6,885 Points

You're welcome...glad I could help.