Swift 2：@objc协议和枚举数组

Question

I have an enumeration defined as follow:

@objc enum MyEnum: Int {
   case Case1, Case2
}

and the following protocol:

@objc protocol MyProtocol {
   func myFunc(myData: [MyEnum])
}

now the protocol throws the following error:

 Method cannot be a member of a @objc protocol because the type of the parameter cannot be represented in Objective-C

I don't understand why this is happening. Why this works:

func MyFunc(myData: MyEnum)

but throws error with the array?

I thought of passing an array of Int and then convert it back to enum but i don't like it very much. Is there a better solution?

Answer 1

I'm not sure, but it shouldn't work because an Objective-C array should contain only pointers, and an enum of Int doesn't contain pointers.

You can try something like this

@objc enum MyEnum: Int {
    case Case1, Case2

    var numberValue : NSNumber {

        get {

            return NSNumber(
                integer: self.rawValue
            )
        }
    }
}

@objc protocol MyProtocol {
    func myFunc(myData: [NSNumber])
}