Hi all, what's the minimal boilerplate code way to define an actual implementation of an expect class straight in swift?

Hello, a big tip about the completion issue with Xcode. If you’re using custom Xcode configuration (more than Debug/Release), it’s breaking SOURCE_KIT. For fixing this issue, add next to your Compile Kotlin Framework - Build phase. •

cd "${SRCROOT}/../shared/build/xcode-frameworks/"

(or any other path to the shared framework •

ln -Fs "${CONFIGURATION}" "Debug"

A Debug directory is mandatory for SOURCE_KIT to work!

If I have a Kotlin interface with functions or variables that have a body and which I don't want to override, when implementing it in Swift, it requires me to still override everything.

It could be a naive question. Is there a support for adding the breakpoint in kotlin code and debug in xcode? If not then how others are debugging the code? What other solutions are there for the same?

Is there a way to properly export a UByteArray type in an interface to Swift? Unlike a normal ByteArray it just turns into Any instead of KotlinByteArray.

👀 KMP Classes not visible in Swift by default 👀 Sometimes I face the issue that classes defined in KMP shared code are not visible in Swift. I work around this issue by adding a “fake usage” to the

MainViewController.kt

class like below. Afterwards I can access

IOSPlatformFile

in Swift code.

fun MainViewController() = ComposeUIViewController { App() }

// so swift code can access this
val platformFile: IOSPlatformFile = IOSPlatformFile("")

Could someone clarify what I’m doing wrong in these cases? Are only classes from the main module visible to Swift by default?

I don't know if it's offtopic or not but I need iOS Device Support files for 18.5 (22F5053f). Would be grateful for any help

Hi , Team I am working on BLE iOS application. While reading the data from BLE device continuously, I am getting below crash Message from debugger: Terminated due to signal 9 Note: app running in background. Any suggestions on how to resolve it? Thanks, GNKumar.

Is there anything I can do to make

embedAndSign

run faster (besides buy new computer)? I'm not using cocoapods nor SPM, only kotlin (and minimum swift boilerplate) yet full ios build still takes 20-30 minutes (macbook M3 16GB ram) *embedAndSign takes >50% of that time

Hey, I am using

kotlin native cocoapods

. I have few questions. 1. Why kotlin native cocoapods plugin automatically creates podspec file upon sync. 2. If i use some cocoapods dependency and like Alamofire. I can define in gradle inside cocoapods block. Upon gradle sync podInstall task is ran by gradle. Then kotlin files of those pods are generated from cocoapods package. This later compiled with the final fat-framework. We can use this framework in any ios app. If so why we need to create a pod file in iosApp and run pod install there as well?

Hey, sorry if this is a stupid question as I don't know much about iOS development. When I use "jump to definition" in XCode on a (KMP) method or class from code, it will jump to that (basically) unreadable generated header file. However if I do the same on the module import it does show that header in a more human readable format, is there a flag or setting I forgot that parses all those

swift_name

attributes?

Hi everyone, Your SwiftUI Preview are not working well or slow because of infinite Gradle build Framework task? The solution : Check for change inside your shared Kotlin source to avoid useless build! Working only if you’re building a dynamic framework

CUR="${SRCROOT}/../shared/build/list_of_files.txt"
OLD="${SRCROOT}/../shared/build/old_list_of_files.txt"
touch $OLD
CHANGES="${SRCROOT}/../shared/build/list_of_changes.txt"

ls -lRT "${SRCROOT}/../shared/src/" > $CUR
diff $OLD $CUR > $CHANGES

if [ ! -s "${CHANGES}" ]; then
  echo "No change in shared source"
  exit 0
fi


if [ "YES" = "$OVERRIDE_KOTLIN_BUILD_IDE_SUPPORTED" ]; then
 echo "Skipping Gradle build task invocation due to OVERRIDE_KOTLIN_BUILD_IDE_SUPPORTED environment variable set to \"YES\""
 exit 0
fi
cd "$SRCROOT/.."
./gradlew :shared:embedAndSignAppleFrameworkForXcode

# set the current change as old after the build is OK
mv $CUR $OLD

How do we know how much stuff we can run in background? iOS sandbox keeps killing our app in background on large network loads for syncing and verification blockchain headers using cryptographic signature verification

Are there any examples of disabling back on a specific screen using Circuit? i want to disabling the swiping that triggers back on a specifiek screen based on some value.

Anyone know how to fix the Dropdown read only selectable text regression on iOS (Regressed 1.7 > 1.8)

Can anyone guide/share a demo setup/steps for adding KMM support on existing iOS project ?

I'm trying to publish a lib that use Room 2.7.1 to maven central, but will using

publishAndReleaseToMavenCentral

on github actions. But I get an error for iOS:

> Task :xxx:compileKotlinIosSimulatorArm64
e: file:///Users/runner/work/xxx/xxx/xxx/build/generated/ksp/metadata/commonMain/kotlin/io/dot/lorraine/db/XXXConstructor.kt:5:24 'actual object XXXConstructor : RoomDatabaseConstructor<XXXDB>' has no corresponding expected declaration
e: file:///Users/runner/work/xxx/xxx/xxx/build/generated/ksp/metadata/commonMain/kotlin/io/dot/xxx/db/XXXConstructor.kt:5:24 XXXConstructor: expect and corresponding actual are declared in the same module.
> Task :xxx:compileCommonMainKotlinMetadata FAILED
e: file:///Users/runner/work/xxx/xxx/xxx/build/generated/ksp/metadata/commonMain/kotlin/io/dot/xxx/db/XXXConstructor.kt:6:23 'actual fun initialize(): XXXDB' has no corresponding expected declaration
e: file:///Users/runner/work/xxx/xxx/xx/src/commonMain/kotlin/io/dot/xxx/db/XXXConstructor.kt:6:24 XXXConstructor: expect and corresponding actual are declared in the same module.

Any idea how to fix it ?

Hi, if I want to use compose resources from a KMP module in iOS Do we have something that does what this function does out of the box?

fun StringResource.localized(): String {
    return runBlocking { getString(this@localized) }
}

Hello guyz, Has anyone encountered this? Is it something to worry about, or is there a better way to safely handle

CGImage

in Kotlin/Native? Warning - Cannot access class 'cnames. structs. CGImage' in the expression type. While it may work, this case indicates a configuration mistake and can lead to avoidable compilation errors, so it may be forbidden soon. Check your module classpath for missing or conflicting dependencies.

fun generateVideoThumbnailIOS(
    uri: String
): ImageBitmap? = memScoped {
    val nsUrl = NSURL.Companion.fileURLWithPath(uri.removePrefix("file://"))
    val asset = AVURLAsset.URLAssetWithURL(nsUrl, null)
    val generator = AVAssetImageGenerator(asset)
    generator.appliesPreferredTrackTransform = true
    val requestedTime = CMTimeMake(1, 1).useContents { readValue() }
    val actualTime: CMTime = alloc<CMTime>()
    val errorPtr = alloc<ObjCObjectVar<NSError?>>()
    val cgImage = generator.copyCGImageAtTime(
        requestedTime = requestedTime,
        actualTime = actualTime.ptr,
        error = errorPtr.ptr
    ) ?: run {
        println("Error: ${errorPtr.value?.localizedDescription}")
        return@memScoped null
    }

    val uiImage = UIImage.imageWithCGImage(cgImage)
    val nsData = uiImage.pngRepresentation() ?: return@memScoped null
    val length = nsData.length.toInt()
    val bytePtr = nsData.bytes?.reinterpret<ByteVar>() ?: return@memScoped null
    val byteArray = bytePtr.readBytes(length)
    val finalThumbnail = Image.makeFromEncoded(byteArray).toComposeImageBitmap()
    return@memScoped finalThumbnail
}

Hello 👋 I’m building an KMP Lib. I have assets under

commonMain/resources/files/frontend

. How do I need to configure Gradle to bundle these assets in the XCFramework and access them via

NSBundle

? I know it must be possible somehow, because of the composeResources, which are getting correctly included. Here is my current access code:

val basePath = NSBundle.mainBundle.resourcePath + "/files/frontend/"

Every help is appreciated 🙂

⚡⚡⚡ ️Question about performance on iOS Given I use purely KMP (no CMP) on iOS. Ui is in SwiftUi, then from my understanding all the Kotlin codes gets compiled into native binaries, as does Objective C. 1. there should be no performance impact if my business/data layer are in Kotlin or Objective C, right? 2. there should also be no battery impact kmp vs objective c, Or am i missing something? People who already use KMP in production: how do you rate performance?

Hi all - I think it's impossible to use

AVCaptureVideoDataOutputSampleBufferDelegateProtocol

because both its method definitions are the same, just with different names:

public expect interface AVCaptureVideoDataOutputSampleBufferDelegateProtocol : platform.darwin.NSObjectProtocol {
    @kotlin.commonizer.ObjCCallable @kotlinx.cinterop.ObjCMethod public open expect fun captureOutput(output: platform.AVFoundation.AVCaptureOutput, didOutputSampleBuffer: kotlinx.cinterop.CPointer<cnames.structs.opaqueCMSampleBuffer>? /* from: platform.CoreMedia.CMSampleBufferRef? */, fromConnection: platform.AVFoundation.AVCaptureConnection): kotlin.Unit { /* compiled code */ }

    @kotlin.commonizer.ObjCCallable @kotlinx.cinterop.ObjCMethod public open expect fun captureOutput(output: platform.AVFoundation.AVCaptureOutput, didDropSampleBuffer: kotlinx.cinterop.CPointer<cnames.structs.opaqueCMSampleBuffer>? /* from: platform.CoreMedia.CMSampleBufferRef? */, fromConnection: platform.AVFoundation.AVCaptureConnection): kotlin.Unit { /* compiled code */ }
}

When I try to implement it, I get the following error:

object : NSObject(), AVCaptureVideoDataOutputSampleBufferDelegateProtocol {
        override fun captureOutput(
            output: AVCaptureOutput,
            didOutputSampleBuffer: CMSampleBufferRef?,
            fromConnection: AVCaptureConnection
        ) {
            super.captureOutput(output, didOutputSampleBuffer, fromConnection)
        }
    }

The corresponding parameter in the supertype 'AVCaptureVideoDataOutputSampleBufferDelegateProtocol' is named 'didDropSampleBuffer'. This may cause problems when calling this function with named arguments.

https://kotlinlang.slack.com/archives/C3PQML5NU/p1752770413738959 Hi Folks, need some help with this error

Hi, Devs Does anyone have any idea , how to unzip the file using Swift without using any CocoaPods?

🧵HAs anyone updated to macOs 26? getting this when building with xcode 26

Has anyone seen this error before? Not sure why im started seeing this all the sudden - all i did was to restart xcode

Execution failed for task ':connect:compileKotlinIosArm64'.
> Error while evaluating property 'kotlinNativeProvider$kotlin_gradle_plugin_common.kotlinNativeBundleVersion$kotlin_gradle_plugin_common' of task ':connect:compileKotlinIosArm64'.
Showing All Messages
   > java.nio.file.FileAlreadyExistsException: /Users/User/.konan/kotlin-native-prebuilt-macos-x86_64-2.2.0/tools/konan_lldb.py

Hi! Quick question: I want to move my

iosApp

into an

apps

directory. I was able to move everything else but the iOS project, for some reason, it won't work. I've tried moving it with the Terminal, but it will not allow me to run the iOS project from the IDE (trough the Kotlin Multiplatform Project) Does anybody knows how can I move it while being able to run it from the IDE?

Hi everyone...

I'm getting this error while trying to implement Google authentication with Firebase:

/Users/ctrltech/StudioProjects/Tmaterials/iosApp/iosApp/FirebaseBridge.swift:37:69 Trailing closure passed to parameter of type 'String' that does not accept a closure

Here is my implementation:

import Foundation
import FirebaseCore
import Firebase
import FirebaseAuth
import GoogleSignInSwift
import GoogleSignIn

@objc class FirebaseBridge: NSObject {
    @objc static func configureFirebase() {
        if <http://FirebaseApp.app|FirebaseApp.app>() == nil {
            FirebaseApp.configure()
        }
    }

    @objc static func isUserSignedIn() -> Bool {
        return Auth.auth().currentUser != nil
    }

    @objc static func signOut() {
        try? Auth.auth().signOut()
    }

    @objc static func signInWithGoogle(presenting: UIViewController, completion: @escaping (FirebaseUserWrapper?, Error?) -> Void) {
        guard let clientID = <http://FirebaseApp.app|FirebaseApp.app>()?.options.clientID else {
            completion(nil, NSError(domain: "NoClientID", code: 0))
            return
        }

        let config = GIDConfiguration(clientID: clientID)
        GIDSignIn.sharedInstance.signIn(withPresenting: presenting) { result in //error happens here
            switch result {
            case .success(let signInResult):
                let user = result.user
                guard let idToken = user.idToken?.tokenString else {
                    completion(nil, NSError(domain: "MissingIdToken", code: 1))
                    return
                }
                let accessToken = user.accessToken.tokenString

                guard let idToken = idToken else {
                    completion(nil, NSError(domain: "MissingIdToken", code: 1))
                    return
                }

                let credential = GoogleAuthProvider.credential(withIDToken: idToken, accessToken: accessToken)

                Auth.auth().signIn(with: credential) { authResult, error in
                    if let error = error {
                        completion(nil, NSError(domain: error.localizedDescription, code: 1))
                    } else if let firebaseUser = authResult?.user {
                        completion(FirebaseUserWrapper(user: firebaseUser), nil)
                    } else {
                        completion(authResult?.user.uid, nil)
                    }
                }
            case .failure(let error):
                if let error = error {
                    completion(nil, error)
                    return
                }

                guard let result = result else {
                    completion(nil, NSError(domain: "GoogleSignInError", code: 1))
                    return
                }
            }
        }
    }
}

@objc class FirebaseUserWrapper: NSObject {
    let uid: String
    let email: String?
    let displayName: String?
    
    init(user: User) {
        self.uid = user.uid
        self.email = user.email
        self.displayName = user.displayName
    }
}

https://github.com/GitLiveApp/firebase-kotlin-sdk/issues/750#issuecomment-3197274509 is iosX64 deprecated already?