Is it possible to use Swift's Enum in Obj-C?

myLifeasdog picture myLifeasdog · Jun 10, 2014 · Viewed 71.6k times · Source

I'm trying to convert some of my Obj-C class to Swift. And some other Obj-C classes still using enum in that converted class. I searched In the Pre-Release Docs and couldn't find it or maybe I missed it. Is there a way to use Swift enum in Obj-C Class? Or a link to the doc of this issue?

This is how I declared my enum in my old Obj-C code and new Swift code.

my old Obj-C Code:

typedef NS_ENUM(NSInteger, SomeEnum)
{
    SomeEnumA,
    SomeEnumB,
    SomeEnumC
};

@interface SomeClass : NSObject

...

@end

my new Swift Code:

enum SomeEnum: NSInteger
{
    case A
    case B
    case C
};

class SomeClass: NSObject
{
    ...
}

Update: From the answers. It can't be done in Swift older version than 1.2. But according to this official Swift Blog. In Swift 1.2 that released along with XCode 6.3, You can use Swift Enum in Objective-C by adding @objc in front of enum

Answer

Daniel Galasko picture Daniel Galasko · Feb 10, 2015

As of Swift version 1.2 (Xcode 6.3) you can. Simply prefix the enum declaration with @objc

@objc enum Bear: Int {
    case Black, Grizzly, Polar
}

Shamelessly taken from the Swift Blog

Note: This would not work for String enums or enums with associated values. Your enum will need to be Int-bound


In Objective-C this would look like

Bear type = BearBlack;
switch (type) {
    case BearBlack:
    case BearGrizzly:
    case BearPolar:
       [self runLikeHell];
}