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iOS Swift 2.0 Protocols Swift 2.0 Protocols Protocols With Methods

Lukas Modrak
Lukas Modrak
1,764 Points
Posted by Lukas Modrak
Lukas Modrak
1,764 Points

Hi, cant finish this task. At part 1, when i implement protocol, it just doesnt accept it and there is no preview.

protocol ColorSwitchable{ func switchColor(color: Color) {

} }

protocols.swift 
// Declare protocol here


enum LightState {
  case On, Off
}

enum Color {
  case RGB(Double, Double, Double, Double)
  case HSB(Double, Double, Double, Double)
}

class WifiLamp {
  let state: LightState
  var color: Color

  init() {
    self.state = .On
    self.color = .RGB(0,0,0,0)
  }
}

1 Answer

Tobias Helmrich
Tobias Helmrich
31,603 Points
Tobias Helmrich
Tobias Helmrich
31,603 Points

Hey Lukas,

the problem is that you're writing curly braces with an empty method body but protocol methods may not have a body. You just have to write the method with its parameter like so:

// 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 {
  let state: LightState
  var color: Color

  init() {
    self.state = .On
    self.color = .RGB(0,0,0,0)
  }
}

I hope that helps! :)

Lukas Modrak
Lukas Modrak
1,764 Points
Lukas Modrak
Lukas Modrak
1,764 Points

Awesome, completely missed that. Thanks a lot.