有没有办法将枚举rawValue向下转换为其类型？(Is there a way to down cast an enum rawValue to its type?)

有没有办法将枚举rawValue向下转换为其类型？(Is there a way to down cast an enum rawValue to its type?)

我有以下枚举：

enum Difficulty: Int { case Opt1 = 1, Opt2 = 2, Opt3 = 3 }

当我尝试将它用作Int那样的时候： MyClass.Difficulty.Opt1.rawValue它不允许我，因为它返回一个RawValue。 理解这是一个Int不应该是明智的吗？

I have the following enum:

enum Difficulty: Int { case Opt1 = 1, Opt2 = 2, Opt3 = 3 }

When I try to use it as an Int like that: MyClass.Difficulty.Opt1.rawValue it doesn't allow me, because it returns a RawValue. Shouldn't it be smart to understand that this is an Int?

最满意答案

鉴于你的代码，我假设你有一个嵌套在类中的枚举，如下所示：

class MyClass { enum Difficulty: Int { case Opt1 = 1, Opt2 = 2, Opt3 = 3 } } var myInteger = MyClass.Difficulty.Opt2.rawValue // Int inferred correctly

我发现这个或任何我能想到的变种都没有任何问题。 如果您仍然遇到问题，请发布MyClass类型的代码。

Given your code I assume that you have an enum nested inside a class like so:

class MyClass { enum Difficulty: Int { case Opt1 = 1, Opt2 = 2, Opt3 = 3 } } var myInteger = MyClass.Difficulty.Opt2.rawValue // Int inferred correctly

I'm not finding any problems with this or any variants I can think of. Please post your code for the MyClass type if you are still encountering problems.