Native Bindings¶

We already covered the SPM plugin on the previous page. If you want to create native iOS bindings, you can do so by adding Swift code inside the starter/native/bindings/src/swift/interop/ folder.

Example:

starter/native/bindings/src/swift/interop/HelloKotlin.swift

import Foundation

@objc public class HelloKotlin: NSObject {

    @objc public static func sayHello(str: String) {
        print("Hello from Swift: \(str)")
    }

}

Important

Make sure your classes and methods are public and annotated with @objc, like in the example above. This is required for Kotlin/Native interop.

Sync Gradle¶

After adding or updating Swift bindings, resync Gradle:

File → Sync Project with Gradle Files

Usage in `iosMain`¶

You can now call your Swift class directly from Kotlin:

composeApp/src/iosMain/kotlin/.../Testing.kt

import interop.HelloKotlin

fun sayHello() {
    HelloKotlin.sayHelloWithStr("DevAtrii")
}

Notes¶

You can implement bindings in other modules, but it’s recommended to keep them inside the starter/native/bindings/ module for simplicity.
This allows seamless interaction between Swift and Kotlin in your KMP project.

Support My Project ☕️¶

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