使用Xcode 6.1的Swift枚举.toRaw和.fromRaw

Question

在Xcode 6.1中，枚举toRaw和fromRaw函数不再起作用：

enum TestEnum : String {
    case A = "a"
    case B = "b"
}

if let a = TestEnum.fromRaw("a") {
    prinln(a.toRaw())
}

错误：

'TestEnum' does not have a member named 'toRaw'
'TestEnum.Type' does not have a member named 'fromRaw'

Answer 1

使用失败的初始化器从原始创建枚举，rawValue并使用属性获取原始值rawValue。

if let a = TestEnum(rawValue: "a") {
     println(a.rawValue)
}

阅读变更日志以获取更多信息。