[Solved] My team is using UIKit with Kotlin/Native on a project, and we’re seeing an interesting error pop up in Crashlytics, but specifically for iOS/iPadOS 13

Hi all. Is there a way to make a kotlin object implement

Identifiable

interface from swift?

I noticed this commit to the runtime a while back. I haven’t heard anything about background usage on iOS being fixed. Is this in the 1.7.10 release?

What should the (XCode) framework search path look like for XCFrameworks? My ios build doesn't find my (KMM) module, there were (several) differences in the search path. XCode is expecting a "Debug" directory when gradle generated "debug", and gradle is creating (architecture?) directories called (eg) ios-x86_64-simulator and originally the search path was looking for iphoneos15.4. I'm running Gradle 7.5.1 with Kotlin 1.7.20, but perhaps I've got old definitions lying around?

I have a C library that I want to cinterop on Android NDK, iOS, and some native desktop platforms. I have this working currently on all platforms. On iOS, I currently embed the frameworks manually and use the same cinterop file. I would like to switch iOS to using the cocoapod for the library. I tried adding the cocoapod and setting packageName to match the cinterop package name, but it looks like it never commonizes the iOS version. Is there a way to make manual cinterop on other platforms commonize with cocoapods on iOS?

hi! sorry, is this plugin the recommended way for sharing a kotlin library with swift package manager? or do you have another plugin/article/post alternative? thanks in advance!

I thought I could create multiple Kotlin iOS targets to achieve iOS 'flavours' of my library. This appears to work until I also add the

cocoapods

plugin to publish it, which then complains that e.g:

This fat framework already has a binary for architecture `x64` (payment_module for target `ios_x64`)

...I guess it's looking to bundle all iOS targets which creates a clash - is there a way to constrain

cocoapods

to only publish one of my targets?

Are there comprehensive docs on consuming an xcframework using cinterop? We have one working for an xcframework that was created using

xcodebuild -create-xcframework -framework

But using the same config for an xcframework created using

xcodebuild -create-xcframework -library

fails. Get an error that there are undefined symbols for the target arch

Undefined symbols for architecture arm64:

If I

lipo -thin arm64

the .a and then search for the symbols using

strings

the symbols are present

When I run my Kotlin iOS app on an iPad 6, doing specific actions lead to it getting killed by the OS with an OOM error. The app was killed while using 1.5GB of RAM with 10MB left available on the device. When running the app in an arm64 simulator on my Mac M1, doing the same actions and more, I can barely make the ram usage spike to 130MB, it seems to stay under 100MB. Where do I go from there? Using the "Instruments" app I found these lines and I don't know how to know what gets allocated in there in Kotlin that takes so much space and stay allocated

Hi, i am trying to implement this ios code example (base64 encode/decode) in kotlin - but am having trouble getting the syntax right https://stackoverflow.com/questions/18827798/how-to-decode-base64-string-to-nsstring-in-ios just wondering if anyone has tips i don't understand objc too well - but i understand the [] are a method call in this case. but i am wondering how to convert

NSString

->

NSData

in kotlin. Then it looks like the base64 encode : decode methods are in NSData? Sorry its a noob question i know ...

This message was deleted.

When using C interop on iOS, is there a good way to measure C-managed memory vs Kotlin/Native managed memory? XCode just shows overall memory usage. I’d like to know what’s causing a sawtooth shape of memory that ranges from 1-2GB. I know the C library has it’s own ARC-like proto-GC.

hi everyone. just set up the jetbrains compose plugin for an ios/android/js project (

id("org.jetbrains.compose")

). We’re only intending to use compose for our android and js targets, but we’re getting the following error when building ios:

Compilation failed: Cannot find the Composer class in the classpath

is there anyway to completely disable the

org.jetbrains.compose

plugin for the ios target?

Has anybody seen their app rejected because it uses Kotlin Multiplatform?

Hey people. I am facing errors while uploading the App with a KMP framework to test-flight. Full details in this You-track issue. Some notes -> -I've removed unnecessary archs. -Built using xcode 14. -Added

binaries.framework {
    embedBitcode(BitcodeEmbeddingMode.DISABLE)
}

to my target declaration. Any help is much appreciated. Stuck in test-flight ipa upload.

I'm having an issue building my ios swift package here: https://kotlinlang.slack.com/archives/C3PQML5NU/p1668413656390309

I get this warning when building

compileIosMainKotlinMetadata

w: Could not find "org.jetbrains.kotlin.native.platform.linux"

I think it’s recent, maybe from Kotlin 1.6.20 or 1.6.21

Any recommendations for xcframework size optimizations in project setup or the

build.gradle.kts

file? My raw release xcframework is around 60MB.

What is the best way to handle toll free bridging in Kotlin/Native? I have a method that returns NSData, and I need to pass this to a method that accepts CFDataRef. These types can be toll free bridged, but I can’t figure out how to do so in Kotlin, since casting doesn’t work.

Hi Folks, I am using Keychain in a Kotlin multiplatform library, and during unit tests + compose iOS app it throws me

errSecNotAvailable

error,

"No keychain is available. You may need to restart your computer."

What can be the reason behind this ? The code works fine in a sample iOS app.

Something changed in Gradle 7.6 from 7.5.x. I have this in the

podspec

file generated by the cocoapods plugin:

spec.pod_target_xcconfig = {
        'KOTLIN_PROJECT_PATH' => ':',
        'PRODUCT_MODULE_NAME' => 'whatever',
    }
                
    spec.script_phases = [
        {
            :name => 'Build events',
            :execution_position => :before_compile,
            :shell_path => '/bin/sh',
            :script => <<-SCRIPT
                if [ "YES" = "$OVERRIDE_KOTLIN_BUILD_IDE_SUPPORTED" ]; then
                  echo "Skipping Gradle build task invocation due to OVERRIDE_KOTLIN_BUILD_IDE_SUPPORTED environment variable set to \"YES\""
                  exit 0
                fi
                set -ev
                REPO_ROOT="$PODS_TARGET_SRCROOT"
                "$REPO_ROOT/gradlew" -p "$REPO_ROOT" $KOTLIN_PROJECT_PATH:syncFramework \
                    -Pkotlin.native.cocoapods.platform=$PLATFORM_NAME \
                    -Pkotlin.native.cocoapods.archs="$ARCHS" \
                    -Pkotlin.native.cocoapods.configuration="$CONFIGURATION"
            SCRIPT
        }
    ]

Notice how

KOTLIN_PROJECT_PATH

has value

:

and the Gradle command ran has parameter

$KOTLIN_PROJECT_PATH:syncFramework

which would be

::syncFramework

. This worked with Gradle 7.5.1 but fails with Gradle 7.6:

Cannot locate tasks that match '::syncFramework'. The path should not include an empty segment (try ':syncFramework' instead).

I suppose they added a check. Can't find it in the changelog. I guess I'll do some kind of

sed

task running after the

podGenIOS

task in order to fix the

podspec

(probably set

KOTLIN_PROJECT_PATH

to empty), but am I right thinking the generated

podspec

file is kinda broken?

I have implemented RSA encryption on kotlin backend and iOS client I am trying to decrypt some data encrypted using public key generated from iOS, the encryption works but decryption fails on iOS using the iOS private key for some reasons 🤔 But the same process works with a jvm app and android app. Has anyone successfully implemented something similar at their end ?

How many megabytes integrating KMM into native iOS project add up to final app size on App Store?

Does anyone have any idea why KMM generates a binary that somehow references UIWebView? I have an existing KMM project, which was integrated with a certain app. It’s funny cause they detect some UIWebView references, but I couldn’t find it in the code and any of the libraries. I decided to create a KMM project from scratch, gradle sync it, and build an iOS framework out if it. And what do I find, I get UIWebView references:

000000000007e760 (__DATA,__objc_const) non-external __OBJC_$_PROTOCOL_INSTANCE_METHODS_OPT_UIWebViewDelegate
000000000007e7c8 (__DATA,__objc_const) non-external __OBJC_$_PROTOCOL_METHOD_TYPES_UIWebViewDelegate
000000000007e748 (__DATA,__objc_const) non-external __OBJC_$_PROTOCOL_REFS_UIWebViewDelegate
0000000000071f78 (__DATA,__objc_protolist) non-external (was a private external) __OBJC_LABEL_PROTOCOL_$_UIWebViewDelegate
0000000000084668 (__DATA,__data) non-external (was a private external) __OBJC_PROTOCOL_$_UIWebViewDelegate
000000000007f8e0 (__DATA,__objc_protorefs) non-external (was a private external) __OBJC_PROTOCOL_REFERENCE_$_UIWebViewDelegate

Any idea why this is? Thanks.

Is there a way to exclude a platform library, e.g., UIKit from being compiled? I have a feeling that the above errors are being caused by the "embedded" UIKit when linking binaries, so even UIWebView is being included in my framework.

_PROTOCOL_INSTANCE_METHODS_OPT_UIWebViewDelegate is not a webview, but the delegate for it.

Regardless, why does it exist there?

Something likely could talk to web view

That's "I can react to events in a UIWebView" not "I necessarily do"

I know what a UIWebViewDelegate is