How kotlin-native call Swift function?

I want to use Kotlin native to make my own cross-platform framework for iOS/Android app

I created a project from the multi-platform tutorial
I just see how Android and Swift can call Kotlin code
but I have no idea to make a message channel when Kotlin want to ask Swift to do something

and I want to make the same thing in Android too

Hello @nkheart, I hope this can help you.
If you make the expect and actual class below the common package and iOS/Android package respectively. You can use swift libraries through kotlin code.
There is an example below.

expect class Location()

expect fun Location.getLocationPermission(): Boolean


actual fun Location.getLocationPermission(): Boolean {
    return CLLocationManager.locationServicesEnabled() && CLLocationManager.authorizationStatus() == kCLAuthorizationStatusAuthorizedWhenInUse

After that you can use the expect “interface” on you kotlin code, and the call will be able to make the iOS or Android implementation.