ios - swift : 具有类型和值的枚举常量

Question

我知道，枚举常量应该是这样的

enum CompassPoint {
    case North
    case South
    case East
    case West
}

但是我怎样才能给第一个元素赋值，比如下面的Objective-C代码

enum ShareButtonID : NSInteger
{
   ShareButtonIDFB = 100,
   ShareButtonIDTwitter,
   ShareButtonIDGoogleplus

}ShareButtonID;

Answer 1

您需要给枚举一个类型，然后设置值，在下面的示例中North设置为100，其余的将是101，102等等，就像 inC和Objective-C。

enum CompassPoint: Int {
    case North = 100, South, East, West
}

let rawNorth = CompassPoint.North.rawValue // => 100
let rawSouth = CompassPoint.South.rawValue // => 101
// etc.

更新：替换toRaw()为rawValue.