How to reference Swift enum in Objective-C Header

Question

Is there a way to reference a Swift enum from an Objective-C header? If you want to see Swift classes in the Objective-C header you can use

@objc class Foo
         


        

Answer 1

As far as I can tell, raf's answer is still correct. The cleanest solution is to simply leave your enum in an Objective-C file until you no longer need to access it from an Objective-C header. I wanted to offer another possible workaround, though.

In my case I am gradually rewriting a large Objective-C project in Swift, and I don't mind an imperfect workaround if it allows me to rewrite more of my code in Swift. So I've settled on simply passing the enum to Objective-C as it's raw type, Int, or NSInteger to Objective-C. For example:

- (void)doSomethingWithType:(NSInteger)rawType {
    if (rawType == ExampleTypeWhatever) {
        // Do something
    } // etc...
}

When I call this method from Swift, all I have to do is pass the .rawType, instead of the actual enum value:

objcObject.doSomething(withType: ExampleType.whatever.rawValue)

This keeps things fairly simple on both sides, and it'll be easy to update once doSomethingWithType: is eventually rewritten in Swift.