swift - 在 Swift 中的函数内调用枚举

Question

我对这个完全不知所措。我的导师在寻找什么？有什么建议吗？

开始了类似的事情，但我刚刚开始..

enum Color: String {

case blue = "orange"
case red = "green"
case yellow = "purple"

}


func complement(_ color) -> String {
    case
}

问题:使用三种原色和三种间色创建一个类型 Color。然后创建一个函数 complement ，它将返回给定颜色的补色。

Red's complement is green
Blue's complement is orange
Yellow's complement is purple

complement(.red) -> .green
complement(.orange) -> .blue

更新:

enum Color: String {
    case red = "red"
    case green = "green"
    case blue = "blue"

    case yellow = "yellow"
    case orange = "orange"
    case purple = "purple"
}

func compliment(_ color: Color) -> Color {
    switch color {
    case .red: return .green
    case .green: return .red
    case .blue: return .orange
    break
    }
}

let red = Color.red
let compliment = compliment(red)
print(compliment)

let green = Color.green
let compliment = compliment(green)
print(compliment)

let blue = Color.blue
let compliment = compliment(blue)
print(compliment)

error: variable used within its own initial value

let compliment = compliment(red)

它对每个实例都执行此操作

Answer 1

由于这是家庭作业，我会给你足够的指导来帮助你开始，但不会为你做。

enum Color: String {
    case red = "red"
    case green = "green"
    case blue = "blue"

    case yellow = "yellow"
    case orange = "orange"
    case purple = "purple"
}

func complement(_ color: Color) -> Color {
    switch color {
    case .red: return .green
    case .green: return .red
    case .blue: return .orange
    // etc.
    }
}

let red = Color.red
let compliment = complement(red)
print(compliment)

在不深入了解颜色理论的情况下，红色的补色不是蓝色 - 它是青色。对于绿色，它是洋红色。蓝色的补色是黄色。