Not able to use Kotlin Extension Function written in common in iOS as Swift Extension

Question

I have a Kotlin Multiplatform project setup with Android & cocoapods for iOS.

I have a file Extensions.kt in commonMain/src with the following function:

fun String.isValidEmail(): Boolean {
    return validate(ValidatorRegex.EMAIL)
}

I am able to access this function in Android as a String extension:

"[email protected]".isValidEmail()

But in iOS using Swift, I need to call it as a static method of another class:

ExtensionsKt.isValidEmail("[email protected]")

It should convert that commonMain/src method to a Swift extension of String instead of a class with a static method.

Am I missing any configuration?

Answer 1

You're doing everything right here. Unfortunately, this option is not available for now. Extensions conversion may be performed correctly for some classes, but Swift's String is not the one. This is a known inconvenience, and K/N team is working hard to make it better.