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iOS Object-Oriented Swift 2.0 Complex Data Structures Custom Initializers

Von Chucwuemeca
Von Chucwuemeca
4,746 Points
Posted by Von Chucwuemeca
Von Chucwuemeca
4,746 Points

Initializers - I've reviewed my code and it should work, however I may be missing something.

The playground informs me that I should not use memberwise initializers, however I've used custom variables for the initializer.

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

    let description: String

       // Add your code below

    init(colorRed: Double = 86.0, colorGreen: Double = 191.0, colorBlue: Double = 131.0, alphaColor: Double = 1.0, theDescription: String = "green") {
        self.red = colorRed
        self.green = colorGreen
        self.blue = colorBlue
        self.alpha = alphaColor
        self.description = "red: \(colorRed), green: \(colorGreen) blue: \(colorBlue) alpha: \(alphaColor)"
    }


}

2 Answers

kasaltrix
kasaltrix
9,491 Points

Although this code is right in it's own way, the question doesn't ask for it. It is clearly given in the question that you should declare a custom initializer rather than using the default initializer provided by Swift.

Your task is to write a custom initializer method for the object. Using the initializer assign values to the first four properties. Using the values assigned to those properties create a value for the description property that is a string representation of the color object.

According to the question, the code can be modified as below-

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

    let description: String

    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)"

    }
}

Hope this helps :)

Von Chucwuemeca
Von Chucwuemeca
4,746 Points
Von Chucwuemeca
Von Chucwuemeca
4,746 Points

Ok, I thought writing my own customer initializers meant using custom terms. I now understand, thanks.