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iOS Protocols in Swift Protocol Basics Protocols With Methods

Need a some help

Not understanding what this mean "Bummer! In the body of switchColor, change the color of the lamp to the value provided as an argument"

protocols.swift
// Declare protocol here
protocol ColorSwitchable {
    func switchColor(_ color: Color)
 }

enum LightState {
  case on, off
}

enum Color {
  case rgb(Double, Double, Double, Double)
  case hsb(Double, Double, Double, Double)
}

class WifiLamp: ColorSwitchable {
  let state: LightState
  var color: Color

  init() {
    self.state = .on
    self.color = .rgb(0,0,0,0)
  }
  func switchColor(_ color: Color) {
        _ = Color.rgb(1,1,1,1)
    }

}

2 Answers

Thomas Dobson
Thomas Dobson
7,511 Points

O'Ryan,

Your close, in your method assign self.color to the Color.rbg().

// Declare protocol here
protocol ColorSwitchable {
    func switchColor(_ color: Color)
 }

enum LightState {
  case on, off
}

enum Color {
  case rgb(Double, Double, Double, Double)
  case hsb(Double, Double, Double, Double)
}

class WifiLamp: ColorSwitchable {
  let state: LightState
  var color: Color

  init() {
    self.state = .on
    self.color = .rgb(0,0,0,0)
  }
  func switchColor(_ color: Color) {
        self.color = Color.rgb(1,1,1,1) //doing it this way sets your lamp color to rbg(1,1,1,1). You will pass the code challenge but wont actually be able to set the color later.
    }

}

instead try setting up your switchColor like I did. Under the class setup can see how it works with the testLamp variable I setup:

// Declare protocol here
protocol ColorSwitchable {
    func switchColor(_ color: Color)
}

enum LightState {
    case on, off
}

enum Color {
    case rgb(Double, Double, Double, Double)
    case hsb(Double, Double, Double, Double)
}

class WifiLamp: ColorSwitchable {
    let state: LightState
    var color: Color

    init() {
        self.state = .on
        self.color = .rgb(0,0,0,0)
    }
    func switchColor(_ color: Color) {
        self.color = color
    }

}

var testLamp = WifiLamp() //lamp setup
testLamp.switchColor(Color.rgb(1, 1, 1, 1)) //change the lamp color
testLamp.color //retunrs rgb(1.0, 1.0, 1.0, 1.0)

I hope this helps.

Thank you very much for your help