Is there a way to have something in the common folder that has default arguments, and just be called...

# multiplatform

[adam-mcneilly]

Is there a way to have something in the common folder that has default arguments, and just be called from iOS with a default constructor?

When I try this, Xcode keeps telling me init() not allowed, and I need to add all params.

So far the only work around I have is using a secondary constructor like this. It's not the worst thing but it feels kind of unnecessary:

class MyClass(
	private val paramOne: Int = 5,
	private val paramTwo: Int = 10
) {
	constructor() : this(5, 10)
}

[Kris Wong]

Obj-C doesn't support default arguments

[Kris Wong]

K/N would need to generate bindings in swift for that to work

[adam-mcneilly]

So the secondary constructor is necessary to do what I want here?

I was wondering if there might be an annotation that could do it, similar to @JvmOverloads.

[Sam]

That is the way that I do it too. It probably has to do with how default arguments are treated in exports. I'm guessing that generating all of the variations of constructors/default arguments for ObjC would be ugly.

[adam-mcneilly]

Yeah I can imagine it gets messy quickly. I think this is fine because I don't need it for every class. It's also a pain because I want to inject a coroutine scope (though maybe I don't really need to do that) and I can't define it from iOS. If they really were ints, maybe I would just supply the defaults from there and call it a day.

[adam-mcneilly]

Is it safe to assume I'll run into this with methods too? It's not just class signatures?

[russhwolf]

Correct. No default args in any context get translated from Kotlin to Swift