Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Protocols in Swift Protocol Basics Protocols With Methods

how do I implement the method inside the class Wifi Lamp?

i cannot use the function inside the class.

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) {

    }
}
Clark Reilly
Clark Reilly
6,204 Points

Oleh Kim, please put your Answer under "Add an Answer" rather than "Add Comment". It makes it easier for people to know the problem has been solved so they don't get e-mails redirecting them to a page with an already solved issue. Also, you can use (three backticks) Swift ... (three more backticks) to write code in your post:

// This is swift code. It's easier to read because of the color coding

1 Answer

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 }}

You dont need to use it. You need just To write what this function will do when you will call it on an instance.