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iOS Protocols in Swift Protocol Basics Protocols With Methods

type 'WifiLamp' does not conform to protocol 'ColorSwitchable'

If it doesn't conform then what doest it do?

protocols.swift
// Declare protocol here

protocol ColorSwitchable {

func switchColor(_: 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)

    override func switchColor(_: Color) {

  }
  }
}

2 Answers

Emin Grbo
Emin Grbo
13,092 Points

You omitted the internal name "color" as well. And you need that in the initial function (protocol)

Then, when you call it, no need to have it inside the init method, just inside the class. And there you just let the swift know that the var color needs to be the color given to the function.

Like so:

// Declare protocol here
protocol ColorSwitchable {
  func switchColor(_ color: Color)
//this is what you missed^
}


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)
  }
  // and now you call the function
  func switchColor(_ color: Color) {
  self.color = color
  }
}

Hope this helped! Keep up the good work and don't forget to mark the correct answer.

thks !