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iOS Protocols in Swift Protocol Basics Protocols With Methods

protocol ColorSwitchable{ func switchColor(_color: Color) } with this, i got an error. Why?

i can not pass the question. i am sure my solution is correct.

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 {
  let state: LightState
  var color: Color

  init() {
    self.state = .on
    self.color = .rgb(0,0,0,0)
  }
}

1 Answer