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iOS Swift 2.0 Protocols Swift 2.0 Protocols Protocols With Methods

Posted by Khambrel Davis
Khambrel Davis
24,572 Points

How do I implement the method that makes the new color?

// 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

func switchColor(color: Color) { return Color }

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

Andis Slaitas
Andis Slaitas
3,430 Points
Andis Slaitas
Andis Slaitas
3,430 Points

I was stuck here too. Please look at Michael Reining's answer on my post.

1 Answer

Jens Hagfeldt
Jens Hagfeldt
16,548 Points
Jens Hagfeldt
Jens Hagfeldt
16,548 Points

Hi Khambrel. You got the first part of the challenge right adding the colon and Protocols name after the classes name. The second part (implementing the method that makes the new color) I made by adding the method demanded by the protocol like here below after the second comment.

/* 1 - Make WifiLamp adopt the ColorSwitchable protocol 
    by adding a colon and Protocols name after the 
    classes name */
class WifiLamp: ColorSwitchable {
    let state: LightState
    var color: Color

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

    /* 2 - Implement the method making new color here */
    func switchColor(color: Color) {
        self.color = color
    }
}

I hope this helped you a bit - Happy coding!

/ Jens