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Start your free trialtrevor gaston
215 Pointsthis
too hard
struct RGBColor {
let red: Double
let green: Double
let blue: Double
let alpha: Double
let description: String
// Add your code below
init(red: Double, green: Double,blue: Double, alpha: Double) {
self.red = 86.0
self.green = 191.0
self.blue = 131.0
self.alpha = 1.0
}
}
1 Answer
Chris White
2,308 PointsHey Trevor,
It looks like you're trying to set the value in the initializer itself rather than setting up the initializer properly and setting the value when you use the struct.
What you need to do is setup the initializer to take the properties for red, green, blue and alpha when you go to initialize it:
init (red: Double, green: Double, blue: Double, alpha: Double) {
self.red = red
self.green = green
self.blue = blue
self.alpha = alpha
}
Basically, you're telling the struct's red property to match the one in your initializer, your green property to match the one in your initializer and so on.
It's a hard concept to communicate and I had trouble wrapping my brain around it too but it helped me to put my cursor in red
for self.red
and see where else the property is used by Xcode's highlighting and then put my cursor in red
after the assignment operator =
to see where that is used.
To the left of the =
you're referring to the struct, to the right you're referring to the init
function.
Then, when you initialize the struct you can specify the actual value for that instance of the struct.
let myColor = RGBColor(red: 86.0, green: 191.0, blue: 131.0, alpha: 1.0)
Here is what I used to complete the challenge:
struct RGBColor {
let red: Double
let green: Double
let blue: Double
let alpha: Double
let description: String
// Add your code below
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)"
}
}
I hope that helps, if it's still confusing let me know and I'll try to clarify further, it would help to know a little more about where you're getting stuck mentally so we can narrow in a little more.