Anyone have advice for kmm interop with Swift Specifically h kotlinlang #ios

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Title

Josh Cockrell

07/12/2022, 5:51 PM

Anyone have advice for kmm interop with Swift? Specifically how Kotlin

Bool

Int

and

Double

become

KotlinBool

Int32

and

KotlinDouble

It's just annoying how every time I call a Kotlin multiplatform method that returns a

Bool

, I need to put a

.boolValue

on the end of it. Or worse, if the method returns an object that has a

Bool

property on it, I either need to convert the entire object manually

user = User(isAdmin: kotlinUser.isAdmin.boolValue)

to get rid of that

KotlinBool

type. Or I need to give in and make my entire Swift codebase deal with a user object that has this

KotlinBool

property on it.

Nikolay Kasyanov

07/13/2022, 7:09 AM

KotlinBool usually appears when there’s nullability, plain Kotlin Booleans become Swift’s Bool most of the time IIRC

or you’re hitting a bug where they don’t

Josh Cockrell

07/13/2022, 2:26 PM

Ah interesting. I'll look into that. What about Int and Double? I would put in a large amount of effort to somehow configure kmm so it knows I explicitly want a Swift Int and Double instead of

Int32

and

KotlinDouble

Nikolay Kasyanov

07/14/2022, 7:34 AM

I wonder from what Kotlin code you get

KotlinBoolean

and

KotlinDouble

(can’t help with

Int32

though – no solution that I know of)

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