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iOS Protocols in Swift Protocol Basics Protocols With Methods

Eugene Lee
Eugene Lee
11,890 Points

this Wifi lamp quiz is impossible. all of posted solutions are failed to pass. do you have any idea. i am about to quit

func switchColor(_ color: Color) { self. color = color } don't pass WiFi Lamp quiz. do you know why? thanks

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)
  }

  func switchColor(_ color: Color) {
       self.color = color
    }
}

2 Answers

Make sure you declare the protocol for the WifiLamp class to implement, in this case it should be

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
    }
}