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iOS Protocols in Swift Protocol Basics Protocols With Methods



// 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.hsb(123.3, 223.3, 323.3, 423.3)

1 Answer


The challenge is asking you to set the WifiLamp object to a "new color".

So for example:

// **** Step 1
// If I was to make an instance of Wifi Lamp, I would do so like this

// Instance
let myWifiLamp = WifiLamp()

// **** Step 2
// If I wanted to change the color of the lamp I would have to call the "switchColor" method

 myWifLamp.switchColor(Color.rgb(123.3, 223.3, 323.3, 423.3))

// OR

let myNewColor = Color.hsb(22.0, 22.0, 22.0, 22.00)

So in order to implement this method what shall we do?

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

Hope this helps you a bit.

I got it Thanks a lot man! May God bless u million times! Appreciate it!)