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iOS Protocols in Swift Protocol Basics Protocols With Methods

Adam Hrabovsky
PLUS
Adam Hrabovsky
Courses Plus Student 2,005 Points

How do I implement the method to set the color of the lamp to the new color?

I looked up how to do it on the support forums but I am still being told my answer is incorrect. Also the preview button is unavailable during this challenge for some reason. Can anyone help me with what I am doing wrong?

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) {
    self.color = color
  }
}

1 Answer

Jorge Solana
Jorge Solana
6,064 Points

Hey Adam!

You almost got it! You missed couple of things: didn't close the switchColor method, and you got it into the init method instead of being a new method of the WifiLamp class.

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
  }
}

Good job and happy coding!