Bridge The Native API

Gradle

The following configuration is a simple bridge between Kotlin and the Swift Apple Native SDK.

build.gradle.kts

swiftPackageConfig {
    create("[cinteropName]") {
    }
}

When syncing the project, the plugin creates a folder at src/swift/[cinteropname].

The content of this folder is your bridge between Swift and Kotlin, everything inside is copied to the build directory.

Example

Make your Swift code compatible with Kotlin.

Your Swift code needs to be marked as @objc/@objcMembers and the visibility set as public or it won't be exported and available from your Kotlin code.

Some tips here.

src/swift/[cinteropname]/mySwiftFile.swift

import UIKit

@objcMembers public class MySwiftBridge: NSObject {
    public func exportedMethod() -> String {
        return "value"
    }
    public func exportedView() -> NSObject {
        return UIView()
    }
}

iosMain/kotlin/com/example/myKotlinFile.kt

import [cinteropname].MySwiftBridge

val contentFromSwift = MySwiftBridge().exportedMethod()

val aView = MySwiftBridge().exportedView() as UIView