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iOS Object-Oriented Swift Complex Data Structures Custom Initializers

samuele carpani
samuele carpani
4,219 Points
Posted by samuele carpani
samuele carpani
4,219 Points

How can i use init correctly?

I have difficulty with the method init, who help me?

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: Double,green: Double, blue: Double,alpha: Double, description: String){
    self.red = 86.0
    self.green = 191.0
    self.blue = 131.0
    self.alpha = 1.0
  }
      description = "red:\(red),green:\(green),blue:\(blue),alpha:\(alpha)"

}

2 Answers

Brandon Mahoney
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Brandon Mahoney
iOS Development with Swift Techdegree Graduate 30,149 Points
Brandon Mahoney
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Brandon Mahoney
iOS Development with Swift Techdegree Graduate 30,149 Points

So the numbers given are just an example, this needs to be reusable. So when you create and instance of the struct what ever values are fed in are what it will use. The struct should be as followed. You can place it in a playground and play around with it.

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

let color = RGBColor.init(red: 86.0, green: 191.0, blue: 131.0, alpha: 1.0)
print(color.description) //prints "red: 86.0, green: 191.0, blue: 131.0, alpha: 1.0"
Brandon Mahoney
.a{fill-rule:evenodd;}techdegree seal-36
Brandon Mahoney
iOS Development with Swift Techdegree Graduate 30,149 Points

No problem.