What is the advantage of adding shared modules into IOS via Cocoapods ? Is there any performance/capability benefits ? I saw many repo that use Cocoapods for that but couldn’t find any explanation why

Hi, how can the test coverage be measured in a kotlin multiplatform shared module for all module components (commonMain, iosMain, androidMain)? Jacoco does not support kotlin multiplatform from what I read.

Hello all, I had a question about Multiplatform use. I was thinking about setting up a project I’m working on in a way, and just wanted to see if people saw any early gotcha’s because of Kotlin’s iOS Framework’s “closed world” concept. I’m creating a Multiplatform library that has a module for requesting data, running authentication, and an umbrella module that references dataSource and auth to create a framework for iOS.

dataSource
auth
umbrella

The auth module holds a common interface for an auth flow I want apps to follow. Because of issues I was having importing iOS frameworks into Kotlin, I was thinking of just creating a Swift Auth Module (I’m new to iOS development so I apologize if that’s not the right language) that would pull in the Kotlin auth framework and make an iOS implementation of that auth interface.  Then my client would pull in the umbrella framework created and also this Swift Auth module/framework.  Would this potentially collide because the Swift Auth Module is referencing one Kotlin Multiplatform framework and the client is also referencing the Kotlin umbrella framework? Or do people have other recommendations on how to tackle this?

Hello, I have dependencies on Firebase to use in iOS. I add them to my cocoapods section in gradle, and the first time it builds it is really slow(almost 30 mins) and makes my computer heat up. Anyway of speeding this up? Particularily happens on podBuildFirebaseIphoneos task. my cocoapods section

ios()
cocoapods {
    ...
    pod("Firebase/Auth", moduleName = "FirebaseAuth")
    pod("Firebase/Firestore", moduleName = "FirebaseFirestore")
    pod("FirebaseMessaging", moduleName = "FirebaseMessaging")
    ...
}

Is this normal?

Is it possible for an expect declaration to use an interface, where the actual implementation implements the interface signature? For example:

// commonMain

expect class FooClass : BarInterface {
    fun fooFun()
}

interface BarInterface {
    fun barFun()
}

// androidMain

actual typealias FooClass = FooImpl

class FooImpl {
    fun fooFun() {}
    fun barFun() {}
}

I get the error on `typealias FooClass`:

Actual typealias 'FooClass' has no corresponding expected declaration The following declaration is incompatible because some supertypes are missing in the actual declaration:
public final expect class FooClass : BarInterface defined in ...

FooImpl

is from a library, so it’s not a class I can modify. But I’m trying to simplify declaring the expect API, as there are several classes that have the same interface.

Hi, I'm just starting to get familiar with Kotlin Multiplatform. Regarding

dates/times

, I'm currently using threeTenBP for both Android and Server. I'm curious, what is the approach for dealing with

DateTime

as its fairly complex with types ( LocalDate, LocalTime, LocalDateTime ) ? Thanks!

Hi everyone. Me and @Jamie Craane have created a gradle plugin to help with cross platform localization. Simply said, you create one file with all strings in all languages and the plugin will generate Kotlin native code so you can use those strings in a shared project (for example a view model). It also creates actual implementations for iOS, Android and JS. We’ve just open sourced it and are in early stages but are looking for feedback and contributions. Have a look at https://github.com/jcraane/kmm-resources/

I'm trying to access

Thread.currentThread()

from a Kotlin Mobile Multiplatform project to check that I am in the main thread, but it doesn't seem accessible. Are my missing something? Is there another way?

Hello everyone, sometimes when Gradle reloads my multiplatform project, IntelliJ "forgets" the source folders for kotlin in the commons, js and/or jvm project (see screenshot) Does anyone know what causes this bug? Or how to "repair" it? Many thanks in advance! Best regards Felix

For example, if a library supports Kotlin Native, does it necessarily support KMM?

I have a dependency issue in multiplatform project and I have prepared a minimum example to show it: https://github.com/micHar/kmm-dependency-issues/tree/master In short - cannot access multiplatform module classes in unit tests of a jvm-only module (NoClassDefFound). Would be super cool if someone could point me in the right direction. Maybe I'm doing something wrong or maybe it's a limitation or a new bug I can report. Please take a look guys.

How do I make sure I'm able to consistently access shared module code from swift code on Xcode? Sometimes I see the classes, other times I can't see it and opening the shared module (on xcode) it's just empty. This is very confusing and frustrating

Is it possible to have a single implementation used for both JVM and Native if all code I've written myself is platform-agnostic?

Hello. Is anyone with problem to add 3rd party library in iOS side project? For example, I want to add Cartography or SnapKit on iOS project, so I have created the Podfile and execute 

pod install

 command, until here with no problem. However when I build the code on Xcode I get the following message:

Link /Users/engenharia/Library/Developer/Xcode/DerivedData/iosApp-ebvxupurowfpqseswfpszjmhtudk/Build/Products/Debug-iphonesimulator/iosApp.app/iosApp
ld: framework not found SnapKit

Ok, so I thought is necessary to add also the cocoapods library in common code. I did that normally with:

kotlin("native.cocoapods")
ios()
cocoapods {
    summary = "Test"
    homepage = "me"

    ios.deploymentTarget = "10.0"

    pod("SnapKit", "~> 5.0")
}

Ok, all the tasks were executed with success. Again in xcode after the build the code I get a new error message:

> Task :shared:cinteropSnapKitIosX64 FAILED
Exception in thread "main" java.lang.Error: /var/folders/l8/vxy_yfbx3wz2z0q_r5068d2h0000gn/T/tmp3849060542759213327.m:1:9: fatal error: module 'SnapKit' not found

In according to the messahe the task shared:cinteropSnapKitIosX64 failed, but it is executed with success in Android Studio.

Can someone explain to me the different use cases for Kotlin Multiplatform and Kotlin Multiplatform mobile? Reading through the KMM website, it seems to me that all the advantages listed also apply to the regular Kotlin Multiplatform. We are a small company and are looking to be able to re-use as much code as possible. The proposal I’ve set forth for my teammates is such: 1) We will use Kotlin Multiplatform to create a library (and eventually an sdk) to contain all of our shared business logic. 2) We will then create a flutter plugin to wrap the multiplatform library, which could be imported into our flutter projects, so we can again write our UIs with a single code base. The reason we’re doing this instead of just creating the library in pure Flutter is that we will eventually turn it into an SDK so that other companies can use it to make apps for their platform of choice. And since the core library would be made with Kotlin Multiplatform that would be possible. (we will continue making our UIs in Flutter since we have experience with it already and to again share code) I’ve successfully created a proof of concept covering the two points above using Kotlin Multiplatform Mobile + Flutter plugin, however, once we start the real work, I’m wondering if it would be better to use the regular Kotlin Multiplatform. After all, if it will generate a JS library for free as we develop, why not?

I'm writing a library that would be used for Android, iOS, and JS. I've got my first test set up, and when I go to run it, the drop down gives js and ios options to run but not jvm or android. I might be missing something simple, but any tips? I've set up the target as

android

and source folders for

androidMain

and

androidTest

.

Hello. I'll appreciate if anyone can help me with this https://stackoverflow.com/questions/65624300/different-schema-for-ios-app-in-kotlin-multiplatform.

if I create an extension function in common kotlin code - am I able to access it in swift?

has anyone seen any multiplatform libraries to help with data paging? looking for something similar to android paging libraries to abstract network / database paging & fetching

https://stackoverflow.com/questions/65830632/cant-access-commonmain-multiplatform-classes-from-a-jvm-only-module/ - put a bounty on that question 😉. seems that the config works for @kpgalligan but I've tried multiple times on different IDEs and different machines, my friends also tried and it consistently fails for us. Maybe I should just post to the issue tracker, but wanted to gain some insight before I do.

I have created a codegen library which generates wrappers for coroutines and flows. Heavily inspired by @russhwolf's article about SuspendWrappers. This is an early preview, a lot will change. I'd appreciate your feedback and sincerely hope this will become useful for the community. https://github.com/FutureMind/kmm-ios-suspendwrapper

Need help

How do you guys debug Kotlin code when running iOS app? Use Android Studio KMM Plugin or Xcode Plugin? Bodys

Are there projects using KMM for logic and others with Flutter for UI? Is this a good thing to do in production?

Hey, Is there any body use composit build with KMM?, when I

includeBuild

my KMM project into a normal android project, I can't reference my KMM shared library class in commonMain, but I can reference androidMain's classes in KMM project's sharedLibrary, Need I do any config else for that? Bros🤔

Just wondering, is there anything that would prevent KMP code to be used for the business logic of the upcoming Harmony OS by Huawei?

Hi guys. Just to give some more information about @Shawn Tuckers message -> We are able to run the gradle scripts for • linkDebugFrameworkIosArm64 • linkReleaseFrameworkIosArm64 • linkReleaseFrameworkIosX64  and it runs properly. The only one that fails is linkDebugFrameworkIosX64. Any advice?

Hi guys. I need to build the shared code to arm32 architecture. So I add the following code in gradle file

iosArm32 {
    binaries {
        framework {
            baseName = "shared"
        }
    }
}

After sync the gradle file the tasks to arm32 architecture were enabled. However, the task compileKotlinIosArm32 fails when executed. I noted that the expect/actual was not resolved for shared.iosArm32Main

(Create actual class for module shared.iosArm32Main)

Can any help me?

why YouTrack mobile app is written in React Native and not KMM? if they have their own solution which they are pushing so hard why use React Native? wouldn’t it be good advertising and proof that KMM is good and ready?