kotlinlang #multiplatform

kotlin {
    targets.withType(org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeTarget) {
        compilations.get("main").kotlinOptions.freeCompilerArgs += "-Xexport-kdoc"
    }
}

to build.gradle, I get the following error during gradle configuration:

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Caused by: groovy.lang.MissingMethodException: No signature of method: build_85rawsls4t4om6gyhg7yes7kk.kotlin() is applicable for argument types: (build_85rawsls4t4om6gyhg7yes7kk$_run_closure6) values: [build_85rawsls4t4om6gyhg7yes7kk$_run_closure6@6b90c290]
Possible solutions: notify(), toString(), toString(), toString(), toString(), split(groovy.lang.Closure)

Any hint what could be wrong?

Ron

10/21/2021, 1:06 PM

Hi! I want to create an immutable object in kotlin multiplatform (ios/android) so it could be shared between threads in swift. can anyone help me? I tried to add

@SharedImmutable

to properties in a class but got this error:

SharedImmutable is applicable only for top level declarations

. Also tried to run

.freeze()

but this function is not available. what am I missing?

edenman

10/21/2021, 8:00 PM

anybody know if the KMM plugin is getting an update soon? Really frustrating to have it not working on latest AS

Sylvain Patenaude

10/21/2021, 8:22 PM

Hi folks, A client of our multiplatform libraries just told us they encountered a problem with our library for android, problem that apparently started with kotlin >= 1.4. (Stacktrace attached as a text file.) It looks like an issue with

UByteArray

where some generated method can't find a static method or something like that. Did something happen with unsigned types with kotlin >= 1.4? Thanks in advance, Sylvain

StacktraceJavaKotlin.txt

jimmyt

10/22/2021, 12:45 AM

I'm working on a KMM project with CocoaPods dependencies. For some reason unknown to me, the iOS Deployment Target for each Pod target on which my project depends is being set to 8.0 each time I try to sync the project, but the range of supported deployment target versions is 9.0 to 14.5.99, so each time I try to sync the project, it fails on the shared:podBuild(PodName)Iphonesimulator task. I tried opening up the project in Xcode and changing the versions manually, but this does not work because the iOS Deployment Target is changed back to 8.0 each time I attempt to sync the project. What else can I do about this?

xiaobailong24

10/22/2021, 1:07 AM

Hello, how to use

annotationProcessor

kapt

with jvm target but without android target?

Pavel Dektev

10/22/2021, 7:57 AM

Hi everyone! I develop KMM app and I can’t run ios project from Android Studio. Maybe someone already had similar issue? From XCode I can build and launch app without any problem

coolcat

10/22/2021, 4:10 PM

I am currently having difficulty building my KMM Android app from within Android Studio on my Mac. The iOS build works within Xcode, and the Android build also works OK on a non-Mac machine. The error is:

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Could not determine the dependencies of task ':shared:cinteropSharedIos'.
> Could not resolve all dependencies for configuration ':shared:iosSharedCInterop'.
   > Authentication scheme 'all'(Authentication) is not supported by protocol 'file'

Any help appreciated.

kenkyee

10/22/2021, 5:31 PM

For folks doing KMP w/ iOS and MVI, how do you handle iOS app state restoration (Android's savedstatehandle equivalent)? No luck searching this channel for "iOS app state restoration" which I thought was the right term for this...

cedric

10/22/2021, 5:40 PM

Something I haven't seen in the various articles/presentations about Kotlin switching to a native WASM back end is: what was found insufficient in the existing LLVM back end? LLVM performs some really incredible optimizations in the assembly it generates, and it gets better every day, so I wonder if the Kotlin team can keep up with all the efforts going into LLVM, and whether it's time well spent...

Kirill Langer

10/22/2021, 6:24 PM

Is there any way to use kotlin specific libraries for Kotlin Multiplatform Mobile common business logic? I have a dependency on Amplify that works fine for just android but doesn't support Kotlin Multiplatform Mobile. I am trying to use it for both ios and android GraphQL queries and subscriptions. I can't add this to common dependencies. Is this possible or do we need to switch to something like apollo for KMM for our GraphQL queries and subscriptions?

🚫 1

Vitaliy Zarubin

10/22/2021, 7:37 PM

For several evenings I have been unable to assemble the KMM default project on m1 in AppCode. Default project Android Studio crash after run application in simulator. Sadness. Yearning.

Dmitriy Tarasevich

10/23/2021, 12:28 PM

Hello, how Is everyone publishing Android artifacts from their KM projects. We have been using https://github.com/kezong/fat-aar-androidfat-aar-android since the start but it seems like kotlin 1.5.31 is incompatible with it. What are some other approaches I can try?

fvink

10/23/2021, 7:08 PM

for those who use AppCode for KMM projects, how do you write UI in it? i know there’s a solution for swiftui preview, but i haven’t been able to find anything for android. any options for xml or compose preview?

Philip Dukhov

10/24/2021, 7:12 PM

My generic module depends on another KMM module. This second module, let's say, has two objects, both subclasses of a sealed class, so I can't put them in different modules. 1. One of them has to be included in the iOS framework, so I force this module to be included as shown here. 2. The second object must be reused in another module, so I can't make it internal, but I need to exclude it from the iOS framework. Is there any way to do this?

Michael Clancy

10/25/2021, 10:11 AM

Hi there, I have asked a similar question concerning OpenCV a few days ago. I am looking to call OpenCV from ios via Kotlin Native. I have found that OpenCV now provides an objective C and swift wrapper as of 4.4.0. Can anyone tell me whether it is currently possible to call Objective C code from native, where the objective C code is dependent on C++? Thanks (Also lmk if this is better suited for the Kotlin Native channel wasn’t sure)

Piotr Prus

10/25/2021, 11:58 AM

I am trying to introduce DDD in kotlin multiplatform mobile project. I have created 2 modules:

infrastructure

that contains repositories, apis, responsesDTO, etc and

domain

that contains usecase interfaces and domain specific data classes. I want ios and android client to know only

domain

, without any idea of

infrastructure

, so in the build.gradle of my

shared

I have:

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api(project(":domain"))
                implementation(project(":infrastructure"))

The issue I am facing: The ios client do not see any of domain classes if theses are not used in

shared

. Is there any way to force compilation of these? Android client sees all of these classes correctly and can make a use of them.

Lital Amos

10/25/2021, 3:12 PM

Hi We’re new to KMM and are just working on our first KMM modules. All was working well for us but after pulling the newest version of our iOS app, gradle build is now failing with this error:

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Executing of 'pod install' failed with code 1.
Error message:

Please, check that file "/Users/workstation/Documents/Workspace/iOS.App/Podfile" contains following lines in header:
source '<https://cdn.cocoapods.org>'

Please, check that each target depended on connectivity contains following dependencies:

I tried changing our Podfile that currently has

source '<https://github.com/CocoaPods/Specs.git>'

this to use the CDN url, ran pod repo update and pod install but this does seem to help. Any insights on how to resolve this?

Yashar

10/25/2021, 3:18 PM

This might be an old issue already solved in

0.7.1

https://kotlinlang.slack.com/archives/C3SGXARS6/p1528475089000678 but I wanted to get another opinion from the community. @kpgalligan (I was told you might be familiar with this). Our dynamic scanner has identified a use of private iOS API:

Frameworks/Core.framework/Core: _unsymbolicated_function accessed _NSBlock

within a KMP library module, which would block the app from getting published in the App store. Upon some digging, I came across this similar old issue on github with fix already merged. So my question is, has anyone else come across this? And if so, is this issue already addressed and have folks been fine publishing to App store without rejections?

Kareem Radwan

10/25/2021, 3:45 PM

hi there after development my shared module by KMM I want extract kmm module as apple framework and add it as pod on external library but when I run the iOS app and

startKoin

I got an Exception Uncaught Kotlin exception: kotlin.IllegalStateException: KoinApplication has not been started
any one have an experience on this way before ?

John O'Reilly

10/25/2021, 4:59 PM

Anyone know of a Kotlin Multiplatform project with a recent working watchos client implementation?

Yehonatan Levi

10/25/2021, 5:30 PM

i am wondering, havne't anyone thought of writing switui code in kotlin directly?

Eirik Vale Aase

10/25/2021, 9:53 PM

macOS Monterey has been released, anyone tested it out with a KMM multiplatform app? Any issues?

👍 4

👀 2

xiaobailong24

10/26/2021, 9:11 AM

Hello, I have an ios oc header file to cinterop in kmm:

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#ifndef socket_swift_bridge_h
#define socket_swift_bridge_h

// <https://github.com/socketio/socket.io-client-swift>
@import SocketIO;

#endif /* socket_swift_bridge_h */

then get error:

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Exception in thread "main" java.lang.Error: /xxx/socket_swift_bridge.h:14:1: error: use of '@import' when modules are disabled
	at org.jetbrains.kotlin.native.interop.indexer.UtilsKt.ensureNoCompileErrors(Utils.kt:152)
	at org.jetbrains.kotlin.native.interop.indexer.IndexerKt.indexDeclarations(Indexer.kt:1003)
	at org.jetbrains.kotlin.native.interop.indexer.IndexerKt.buildNativeIndexImpl(Indexer.kt:992)
	at org.jetbrains.kotlin.native.interop.indexer.NativeIndexKt.buildNativeIndex(NativeIndex.kt:91)
	at org.jetbrains.kotlin.native.interop.gen.jvm.MainKt.processCLib(main.kt:268)
	at org.jetbrains.kotlin.native.interop.gen.jvm.MainKt.interop(main.kt:76)
	at org.jetbrains.kotlin.cli.utilities.InteropCompilerKt.invokeInterop(InteropCompiler.kt:45)
	at org.jetbrains.kotlin.cli.utilities.MainKt.mainImpl(main.kt:38)
	at org.jetbrains.kotlin.cli.utilities.MainKt.main(main.kt:60)

so, how to solve it? thx

Matti MK

10/26/2021, 9:56 AM

setAllowsCellularAccess

anymore relevant for networking with ktor on iOS KMM, for example, as seen in the sample code linked below? I’m using the default engine (https://ktor.io/docs/http-client-engines.html#default) and network requests seem to go through just fine on WiFi and cellular which makes me wonder if there’s some edge case that would require explicitly calling

setAllowsCellularAccess

with

true

? https://github.com/Kotlin/kmm-production-sample/blob/master/shared/src/iosMain/kotlin/com/github/jetbrains/rssreader/core/IosHttpClient.kt#L11

Stefan Oltmann

10/26/2021, 10:21 AM

What alternatives can you recommend to Ktor client for shared network code (iOS, Android, JVM)? (I tried Ktor, but is really has a lot of bugs and is slow to adopt changes like the M1 transition. I don't like it as all.)

Brian Donovan

10/26/2021, 2:48 PM

Hey guys the KMM plugin doesn’t come up for me. I am on chipmunk 2021.2.1 Canary 2

Jim

10/26/2021, 6:59 PM

👋 can I control where kotlin-native-prebuilt-macos-x86_64-1.5.31.tar.gz and similar are downloaded from? I'm required to use an internal repository

Brian Donovan

10/26/2021, 7:49 PM

I’m trying to add these dependencies, any help please

Andrey Chernov

10/27/2021, 7:35 AM

Hello! Does anyone has positive experience with any gRPC client and generate network calls and messages code from .proto files in mobile common code? We look to

wire

(https://github.com/square/wire) now but it’s have android official sample only