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iOS Protocols in Swift Protocol Basics Protocols With Methods

help please

I can't understand

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

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

1 Answer

Garrett Votaw
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Garrett Votaw
iOS Development Techdegree Graduate 15,223 Points

Hey Mohammad,

You are pretty close!

Inside your method you are assigning _ to Color.self

the task is asking you to just assign the color you pass into the function to the color property on the class.

class WifiLamp: ColorSwitchable {
  let state: LightState
  var color: Color

  func switchColor(_ color: Color) {
    self.color = color //Here I am just assigning the color parameter to self.color (WifiLamp.color).
  } 


// I can rename the properties to make it a bit more clear

class WifiLamp: ColorSwitchable {
  let state: LightState
  var wifiLampsColor: Color

  func switchColor(_ parameterColor: Color) {
    self.wifiLampsColor = parameterColor //here it is more clear on what exactly is happening.
  } 

Hope that helps! Happy Coding!