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iOS Object-Oriented Swift Complex Data Structures Custom Initializers

Richard Pitts
PLUS
Richard Pitts
Courses Plus Student 1,243 Points
Posted by Richard Pitts
Richard Pitts
Courses Plus Student 1,243 Points

I don't know where to go from here!

I don't know where to go from here!

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

  let description: String

  // Add your code below
  init("red": 86.0, "green": 191.0, "blue": 131.0, "alpha": 1.0)
}

2 Answers

doesitmatter
doesitmatter
12,885 Points

Init is a function which you need to define using parameters. Your mistake is that you keep entering values into it.

This is it:

// we define a function named init which initialises all the attributes of the struct, with the values which are passed to it
  init(red : Double, green : Double, blue : Double, alpha : Double){
    self.red = red
    self.green = green
    self.blue = blue
    self.allha = alpha

     self.description= "red: /(red), green: /(green), blue: /(blue), alpha: /(alpha)"
}

After we defined this init function we can create a RGBColor struct using:

let someColor = RGBColor(red: 86.0, green: 191.0, blue: 131.0, alpha: 1.0)

, they don't ask you to do this in the assignment, but this demonstrates how the struct can be used after it is properly defined.

doesitmatter
doesitmatter
12,885 Points
doesitmatter
doesitmatter
12,885 Points 
  // Add your code below
  init(red : Double, green : Double, blue : Double, alpha : Double){
    self.red = red
//do the same as I did with red for the green, blue and alpha 
//then put all the values in the description constant


  }
Richard Pitts
Richard Pitts
Courses Plus Student 1,243 Points
Richard Pitts
Richard Pitts
Courses Plus Student 1,243 Points

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

let description: String

// Add your code below init(red: 86.0, green: 191.0, blue: 131.0, alpha: 1.0) self.red = red self.green = green self.blue = blue self.alpha = alpha }

I tried that and I still could not get it to work