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iOS Protocols in Swift Protocol Basics Protocols With Methods

Saleh Bubishate
Saleh Bubishate
1,613 Points

What does this Bummer means in this challenge?

Bummer: In the body of switchColor, change the color of the lamp to the value provided as an argument

// Declare protocol here

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) {
   let color = color 


protocol ColorSwitchable {
 func switchColor(_ color: Color)

1 Answer

Magnus Hållberg
Magnus Hållberg
17,232 Points

The error message just tells you that you are not using the color property in the class. That is because you have declared a new constant named color inside the body of the switchColor method, to correct this you only need to set it to self.color = color instead. That's it.