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vivek d
iOS Development Techdegree Student 1,596 Pointshow to write the function ?
how to write the func to change 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 {
var state: LightState
var color: Color
init() {
self.state = .on
self.color = .rgb(0,0,0,0)
func switchColor(_ color: Color) {
color = .hsb(0, 0, 0, 0)
}
}
}
1 Answer
Matthew Long
28,407 PointsYou've almost got it, but for a couple things. First off, the switchColor method doesn't need to be inside init method. Secondly, and perhaps what is most confusing, you need to set the color of the lamp to the color that is passed in. Do this with self:
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) {
// set lamps color to the local argument color
self.color = color
}
init() {
self.state = .on
self.color = .rgb(0,0,0,0)
}
}