swift:类型和值的Enum常量

I know, enumeration constant should be like this in swift

我知道，枚举常数在swift中应该是这样的

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

But how can I assign value to first element, like Objective-C code as below

但是我如何给第一个元素赋值，比如下面的Objective-C代码

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

}ShareButtonID;

1 个解决方案

#1

You need to give the enum a type and then set values, in the example below North is set as 100, the rest will be 101, 102 etc, just like in C and Objective-C.

您需要给enum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，就像在C和Objective-C中一样。

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

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

Update: Replace toRaw() with rawValue.

更新:用rawValue替换toRaw()。

#1