Swift 如何使用 enum 获取字符串值

使用 Swift 中的枚举(enum)类型可以方便地定义一组相关的值。而在某些情况下，我们可能需要将枚举类型的值转换为对应的字符串值。本文将介绍如何使用 Swift 的枚举类型来获取字符串值，并通过案例代码来进一步说明。

swift
enum Direction {
    case north
    case south
    case east
    case west
    
    var stringValue: String {
        switch self {
        case .north:
            return "North"
        case .south:
            return "South"
        case .east:
            return "East"
        case .west:
            return "West"
        }
    }
}
let direction = Direction.north
let stringValue = direction.stringValue
print(stringValue) // 输出 "North"

swift
enum Direction {
    case north
    case south
    case east
    case west
    
    var stringValue: String {
        switch self {
        case .north:
            return "North"
        case .south:
            return "South"
        case .east:
            return "East"
        case .west:
            return "West"
        }
    }
}
let direction = Direction.east
let stringValue = direction.stringValue
print(stringValue) // 输出 "East"