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iOS Swift 2.0 Protocols Swift 2.0 Protocols Protocols With Methods

Posted by John Cotton
John Cotton
10,936 Points

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

Not sure how to make the method conform and switch the color.

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

    init() {
        self.state = .On
        self.color = .RGB(0,0,0,0)
    }
    func switchColor(color:Color){



    }
}

1 Answer

Matthew Young
Matthew Young
5,133 Points
Matthew Young
Matthew Young
5,133 Points

Looks like the only step left is to use the switchColor function to change the color of the light. To do so, just replace your switchColor function with the following:

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

By implementing the required methods defined by the protocol, you've already conformed to the protocol. Now, you can use the method however necessary within your code.

John Cotton
John Cotton
10,936 Points

Thank you. I kept getting it to 'conform' in an xcode playground. But I got confused by the wording of the question.