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iOS Swift 2.0 Protocols Swift 2.0 Protocols Modeling Behavior With Protocols

Steven Alvarez
Steven Alvarez
5,509 Points
Posted by Steven Alvarez
Steven Alvarez
5,509 Points

The Preview button to see compiler errors is missing

The error is asking me to check the compiler errors but the button is completely missing from this challenge.

1 Answer

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

Right, it's missing. What you can do in that case, if you have Xcode installed, is copy the code to a playground and fix any errors there. Since you didn't include your code I can't discuss changes, but here's a version the Challenge accepts:

protocol ColorSwitchable {                            //the requested protocol
    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) {                  //the method the protocol requires to be implemented
    self.color = color                                //changing the member variable color to the value of the parameter
    }
}