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iOS Swift 2.0 Protocols Swift 2.0 Protocols Protocols With Methods

Dhruv Mittal
Dhruv Mittal
3,050 Points

Why is this not working?

I can't pass this code challenge, there is something wrong with my function in WifiLamp class i think...

// Declare protocol here
protocol ColorSwitchable {
    func switchColor(color: Color) -> WifiLamp{

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) {
        self.color = color

1 Answer

Aaron Kaye
Aaron Kaye
10,948 Points

In the ColorSwitchable protocol, the method switchColor should not have a return type (you are saying it will return a WifiLamp). Also you don't need the curly braces because you are defining the method signature, not the implementation in the protocol. It is set to conform to the protocol though so that should fix it!