Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Protocols in Swift Protocol Basics Protocols With Methods

Maarten De Kruif
Maarten De Kruif
7,314 Points


My code for the project switchColor is still not working. Anybody a solution? Thanks in advanca!

// Declare protocol here
protocol ColorSwitchable {
  func switchColor(_ color: Color) {
  self.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) 


1 Answer

Jorge Solana
Jorge Solana
6,064 Points

Hey Maarten!

I answered this thing yesterday with the solution for your problem! Check back your previous post to check the solution!