we have finally found some time to start testing this KMMBridge We found an issue someone already resolved about the setup of the repo (clicking on Template) https://github.com/peterjgrainger/action-create-branch/issues/372 that it is solved here Also we have found the SSH key to be generated doesn't have to be created with the passphrase. We keep updated the thread

View Model Login did not fix the issue the issue unfortunately, same number of realms are opened

Any other advice?

Are there any examples of wrapping native libraries with Kotlin? I wrote a wrapper around two parallel, but different, Android and iOS libraries. The iOS library relies on Cocoapods for importing the dependency. However, it doesn’t then export the cocoapod dependency (dynamic loading). When I try to depend on the Kotlin cocoapod podspec, Gradle complains about an implicit dependency. Any ideas about the best way to configure the build tools for this?

Hello all. I have a KMM app that runs smoothly in Android, but when I run the iosApp, the build fails with these errors:

Compilation failed: IrClassPublicSymbolImpl for com.example.iosbuildfixapp/ComposableSingletons$AppKt|null[0] is already bound: CLASS OBJECT name:ComposableSingletons$AppKt modality:FINAL visibility:internal superTypes:[]

java.lang.IllegalStateException: IrClassPublicSymbolImpl for com.example.iosbuildfixapp/ComposableSingletons$AppKt|null[0] is already bound: CLASS OBJECT name:ComposableSingletons$AppKt modality:FINAL visibility:internal superTypes:[]

/Users/sn/AndroidStudioProjects/iosBuildFixApp/iosApp/iosApp/ComposeView.swift:17:9 Cannot find 'AppKt' in scope

Has anyone seen this issue before and know how to fix it? Thank you! Code is attached for reference .

What is the best way to go about using my Kotlin code in an IOS App? I followed the tutorial on the website but just ignored the Android part as, I am just making an IOS app, I keep getting a bunch of strange errors with when I build my app in Xcode. I have my linker flags, framework search paths, and script to build my Kotlin code when I build my IOS app setup exactly like the tutorial. I googled around and these errors seem unique to my situation. Are you aware of any better tutorials for using Kotlin code in an IOS app? Any idea what I am doing wrong?

image.png

The GitLab CI runners were previously providing

amd64

runners, but they stopped. Now, they only provide M1-based runners. We were previously running our tests with

./gradlew iosSimulatorArm64Test

, but this fails with the new runners. I assume M1 chips cannot run them?

Xcode does not support simulator tests for ios_simulator_arm64. Check that requested SDK is installed.

What is the correct target to run the project's unit tests on an M1 chip? I don't see any other target starting with

iosSimulator

.

Can someone help me understand the limitation of using coroutines on iOS? On https://kotlinlang.org/docs/multiplatform-mobile-concurrency-and-coroutines.html it says it "_supports usage only in a single thread. You cannot send work to other threads by changing a dispatcher_". I figured this to mean: • iOS uses one thread, so even if you switch dispatchers all coroutines will be executed on the same thread. ◦ (which shouldn't be an issue since many coroutines can run on one thread) • Performance will decrease when this thread gets blocked (because all coroutines have to wait for it to unblock) • Main thread should be safe, because from iOS you call the main

suspend

fun using async/await (and so it's not the main thread anyway) I tested this by doing a network call 20 times in a row in a suspend fun, on the IO dispatcher in my

commonMain

code:

suspend fun run() {
  log("Starting network calls")
  repeat(20) { doNetworkCall(); log("Call $it done") }
  log("Did network calls")
}

The screen recording attached to this video shows that the UI thread doesn't get blocked. Now, please help me and correct me if I'm wrong with my two concerns about my test: 1. I see that the SwiftUI spinner keeps spinning, so I assume the main thread is not blocked; 2. This post states that the one thread is "_used for both main and background thread in iOS_", which sounds like the main thread, so it should be an issue even if my test doesn't show it? https://emmanuelkehinde.io/supporting-multithreaded-coroutines-in-a-kotlin-multiplatform-project/ (see thread for video)

Hello! Hope this is the right channel to ask. I have a Kotlin multiplatform project with 3 modules: LibA, LibB and Umbrella. Module Umbrella has no source files and only has dependencies on modules LibA and LibB. Module Umbrella is configured to have XCFramework for two targets: iosArm64 and iosSimulatorArm64. And it is configured to export dependencies LibA and LibB. When I run

gradle assembleUmbrellaXCFramework

, it doesn't assemble an XCFramework and the task has

NO-SOURCE

status. However, if I add just one empty Kotlin file to the src of the Umbrella module and run the same task again, it successfully assembles XCFrameworks. I wonder if there is a way to assemble XCFrameworks with no source files?

Hi, anyone who could help ? I'm looking for iOS API similar to PluralRules on android.

Hi, you all! I’m new to kotlin development, and i’m trying to build an xcframework with KMM. I use the multi platform library template, and these are in my build.gradle which seems right. I know this is very basic question, but anyone have an idea that how can I get the .xcframework file? I don’t see any save path defined in gradle file. After I click “make project” in Android Studio, I can’t find any .xcframework file in my project directory. So where is the generated .xcframework after the build? Thanks!

Hello everyone! In my current company we are interested in how the KMM generated Objective-C types are typically used inside the iOS project. Are you using the Objective-C types directly or do you have a layer mapping each Objective-C type to a Swift type? The latter approach looks unneeded overhead and defeating part of the advantages of KMM at first sight but we'd like to understand if there are some benefits using this approach. Thanks!

Hi All. I got an interesting problem. Hope anyone can help me 🙂 So I got a KMM project that depends on a local Objective-C project through

cocoapods

, and my KMM project then needs to publish a Swift Package (I use

io.github.luca992.multiplatform-swiftpackage

). Everything works fine until I try to use the Swift Package in an Swift project and get a:

Undefined symbols for architecture x86_64:
  "_OBJC_CLASS_$__TtC13TestPodTestClass", referenced from:
      objc-class-ref in TestModule(result.o)
ld: symbol(s) not found for architecture x86_64

Here is an example with a similar `build.gradle.kts`:

kotlin {    
    ios()
    macosX64()

    if (System.getProperty("os.arch") != "x86_64") { // M1Chip
        iosSimulatorArm64()
        macosArm64()
    }
    
    cocoapods {
            this.summary = "Summary"
            this.version = rootProject.version.toString()
            this.authors = "Test"
            this.ios.deploymentTarget = "13.0"
            this.osx.deploymentTarget = "12.0"
            this.tvos.deploymentTarget = "13.0"
            this.watchos.deploymentTarget = "8.0"
            framework {
                baseName = "TestModule"
                isStatic = false
            }

            pod("TestPod") {
                version = "1.0.0"
                source = path(project.file("../iOSLibs/TestPod"))
            }
    }
    
    multiplatformSwiftPackage {
        packageName("Test")
        swiftToolsVersion("5.3")
        targetPlatforms {
            iOS { v("13") }
            macOS { v("11") }
        }
        outputDirectory(File(rootDir, "output/test"))
    }
}

Hi, anyone has worked on local cocoapod before? I’m trying to use my own cocoapod in my project, so I copied the pod directory to my project and specify

source = path(project.file("../my-pod"))

in my gradle. It works fine in the beginning. But when I make code changes in that pod, I found it seems doesn’t take effects in kotlin project. Sometimes it will lead to build error, sometimes it builds but my new added part doesn’t work. Am I missing some steps after editing my pod?

Hey, I’m trying to develop an app using compose multiplatform and KMM, One of the basic functionality is SingIn with Google so I got it working fine in Android, and when Implemented it in iOS by adding

pod("GoogleSignIn")

It didn’t work when I tried to sync my project and I got the following

The following build commands failed:
	
CopyPNGFile /Users/.../shared/build/cocoapods/synthetic/IOS/build/Release-iphonesimulator/GoogleSignIn/GoogleSignIn.bundle/google@2x.png /Users/.../shared/build/cocoapods/synthetic/IOS/Pods/GoogleSignIn/GoogleSignIn/Sources/Resources/google@2x.png (in target 'GoogleSignIn-GoogleSignIn' from project 'Pods')
	
CopyPNGFile /Users/.../shared/build/cocoapods/synthetic/IOS/build/Release-iphonesimulator/GoogleSignIn/GoogleSignIn.bundle/google@3x.png /Users/.../shared/build/cocoapods/synthetic/IOS/Pods/GoogleSignIn/GoogleSignIn/Sources/Resources/google@3x.png (in target 'GoogleSignIn-GoogleSignIn' from project 'Pods')
	
CopyPNGFile /Users/.../shared/build/cocoapods/synthetic/IOS/build/Release-iphonesimulator/GoogleSignIn/GoogleSignIn.bundle/google.png /Users/.../shared/build/cocoapods/synthetic/IOS/Pods/GoogleSignIn/GoogleSignIn/Sources/Resources/google.png (in target 'GoogleSignIn-GoogleSignIn' from project 'Pods')
(3 failures)

but when I tried to run the iOS app directly it works without giving me any issues and I can’t sync on Android studio due to the above error, and when I tried to change pod(“GoogleSignIn”, linkOnly = true) then I can get the project synced but iOS stopped working. I’m using Kotlin 1.8.22 and Android Studio Flamingo | 2022.2.1 Patch 2 Any thoughts?

A quick question: is there a way to run “pod install” or “pod update” in kotlin project? I’m working on a KMM library so there isn’t an iOS App directory.

Is it possible to work on native code for iOS from Windows? I have some code that uses imports from

<http://platform.xxx|platform.xxx>

which resolve just fine in Android Studio on a MacBook, but on Windows the reference cannot be resolved.

How would I go about using

AVAudioRecorder

from Kotlin code? If I try to write code that accesses it, I get this linking error:

Undefined symbols for architecture x86_64: "_OBJC___CLASS_$_AVAudioRecorder", referenced from: objc-class-ref in shared(result.o)

. I checked for other people having this problem, but it seems to mostly occur with external dependencies, while to the best of my knowledge

AVAudioRecorder

should be included in the standard iOS SDK. Is it related to me running the project in a simulator on an x86_64 Mac?

Does anyone have issue with Xcode 14.3 SwiftUI preview while using some cocoapods? I've described the preview infinite build loop is this ticket. The weirdest thing is that only 1.9.0-RC works.

Hi, I’m using kotlin to build .xcframework file, is there a method to config that let the output include .swiftinterface? it gonna be something like this

I have two Kotlin modules, call them A and B. A uses APIs that B provides: a class from ‘A’ uses another class from ‘B’ in its initializer. However, when I try to initialize the class in ‘A’, it doesn’t want to accept the class because both modules export the API of ‘B’, and they’re not equivalent. How can I do this?

Hello does anyone have any experience migrating a native iOS app to KMM? We don't have a native Android app yet, only iOS so far. any resources or advice would be appreciated!

One key part of this app is a custom framework that uses advanced Swift language features for meta-programming, and it's tightly coupled to UIKit. Otherwise we would just easily use a code translator and switch out the obvious frameworks. My team is looking for a consultant to guide us through and/or help us do this port

I’m trying to write a Multiplatform wrapper for couchbase lite, but when importing the cocoapod for couchbaselite(objective-c), it seems to not be generating anything in the cocoapod import/commonizer. I have ran all the cocoapod tasks in gradle and it is successful but then when i look inside the build folder, it doesnt look like anything is imported in. I have created a public repo with the issue: https://github.com/MyUNiDAYS/couchbaselite-kotlin-sdk It seems like when the import happens, there is no headers for it to generate from 🧐

Does anyone have recommendations for sharing view model state through KMP? Also, how to handle app navigation? I see the Decompose and MVI-Kotlin libraries are quite mature, but they also seem pretty heavy / opinionated. Do you have to use them together, or can you mix and match? Are libraries even necessary?

I get an issue when compiling my multiplatform project for iOS specifically. This error occurs during compilation:

error: java.lang.IllegalStateException: no implementation for FUN MISSING_DECLARATION name:<get-icon> visibility:public modality:FINAL <> () returnType:kotlin.Nothing
in <package>.ChatTab
    at org.jetbrains.kotlin.backend.konan.llvm.objcexport.ObjCExportCodeGeneratorKt.findImplementation(ObjCExportCodeGenerator.kt:1795)
	at org.jetbrains.kotlin.backend.konan.llvm.objcexport.ObjCExportCodeGeneratorKt.createDirectAdapters$getAllRequiredDirectAdapters(ObjCExportCodeGenerator.kt:1781)
	at org.jetbrains.kotlin.backend.konan.llvm.objcexport.ObjCExportCodeGeneratorKt.createDirectAdapters(ObjCExportCodeGenerator.kt:1787)
    (+ a lot of further lines)

This is the code that triggers it I think:

class ChatTab : Tab {
    override val options: TabOptions
        @Composable
        get() {
            val icon = rememberVectorPainter(Icons.Default.Chat)

            return remember {
                TabOptions(
                    index = 0u,
                    title = "Chat",
                    icon = icon
                )
            }
        }

    @Composable
    override fun Content() {

    }
}

The error message seems to imply that the error comes from the getter of the

icon

property, which is defined in the parent interface (part of the Voyager library):

@Deprecated(
    message = "Use 'options' instead. Will be removed in 1.0.0.",
    replaceWith = ReplaceWith("options")
)
public val icon: Painter?
    @Composable get() = options.icon

The issue does not occur when compiling for Android. What is confusing to me is that the error message seems to make some wrong assumptions about the getter? Since it comes from an interface it can't be

final

and the return type is also not

Nothing

.

Is there a way to check for Obj-C API availability in Kotlin code? I ran into an issue where I accidentally used an API that was only available on iOS 15 and it crashes on iOS 14.

Anybody facing this issue? When i make changes in android studio and i head to Xcode to build using

command+b

then i get this error. I have to head back to android studio to run the project before i could build on Xcode

is there a good example of an xcode build phase script that kicks off a pod/podspec assemble gradle task for an upstream KMP project dependency?