I know there is cinterop support, but is it possible to take a existing objective-c library and translate it into kotlin too? And if so, is there an example where this is done?

Xcode just updated and now I get a crash at runtime when running my iOS app.

failed to demangle superclass of MainViewController from mangled name '13MyProject22BaseViewControllerCySo16MyItemCSo0G24MyPresenter_pG'

This is the original line in Swift:

class MainViewController: BaseViewController<MyItem, MyPresenter>, MyView

(MyItem, MyPresenter, MyView are Kotlin classes) I found this in the release notes under "Known Issues" (https://developer.apple.com/documentation/xcode_release_notes/xcode_10_2_release_notes/swift_5_release_notes_for_xcode_10_2):

Linking against a static Swift library might create a binary with missing type metadata because the object files that define the metadata inside the static archive are mistakenly considered unused. (47598583)

This can manifest as a Swift runtime error with a message such as: “failed to demangle superclass of MyClass from mangled name ‘<mangled name>’”.

Workaround: If you can rebuild the static library, try building it with whole module optimization enabled. Otherwise, add -all_load to the linker flags in the client binary to ensure all object files are linked into it.

I tried adding the all_load linker flag to my Xcode project but there was no difference, but I might have added it wrong as I am very new to Xcode. Could anyone help me out?

As Swift5 is now released with stable ABI, I guess it's time to ask for the plans regarding direct Swift interop again 🙂 I do understand that the unstable ABI was enough of a reason not to go for Swift introp yet. But I also understand that it was not the only reason. Any updates on that topic for the kotlin fans waiting?

It's like no matter what changes I make to what, it still gives me that linker error. I have no idea what's going on

Would I be able to somehow get wchar_tVar as a ByteVar and then get it as a KString?

I wonder how hard it would be for cinterop to support obj-c++? for instance, the only difference in my header files is that the forward declarations use namespacing. I understand it would be more problematic if there were c++ headers included.

Hello, I'm trying to connect to internet with Kotlin/Native (macOS), but it doesn't work. Could anyone tell me where is wrong? https://stackoverflow.com/questions/55349254/how-can-i-connect-through-http-in-kotlin-native-ios-development https://github.com/KenjiOhtsuka/macos_kotln_native

object WebGateway {
    fun get(urlString: String): String {
        val semaphore = dispatch_semaphore_create(0)

        val components = NSURLComponents(urlString)
        val url = components.URL
        var result: String = ""
        val config = NSURLSessionConfiguration.defaultSessionConfiguration()
        config.waitsForConnectivity = true
        config.timeoutIntervalForResource = 300.0

        val request = NSURLRequest.requestWithURL(url!!)
        val session = NSURLSession.sessionWithConfiguration(
            config, null, NSOperationQueue.mainQueue()
        )

        val task =
            session.dataTaskWithRequest(request) { nsData: NSData?, nsurlResponse: NSURLResponse?, nsError: NSError? ->
                nsData?.run { result = toString() }
                println(nsData)
                dispatch_semaphore_signal(semaphore);
            }

        task.resume()
        session.finishTasksAndInvalidate()
        NSOperationQueue.mainQueue().waitUntilAllOperationsAreFinished()
        dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER)
        return result
    }
}

when i execute

main.kexe

, any meaningful output doesn't appear but the program doesn't finish.

Hi! Could anyone tell me how I can use an object that I have a CPointer to? I'm trying to use the posix readdir method like so:

var entry = readdir(dp)

. The entry that is returned is a CPointer<dirent>. I want to use the dirent directly to get the name. One Attempt was to do this

val name = entry[0].d_name.toString()

, but that is giving me a useless string that looks like this "CPointer(raw=0x2904670)"

Is there any way to deal with inheritance when using K/N as a dynamic library? I was hopeful I’d be able to cast the pointers and access different attributes of different classes, but that doesn’t appear to be the case. A simple Kotlin setup I’m trying is

abstract class Parent(val a: Int) {}

class Child(val b: Int, a: Int) : Parent(a) {}

fun make_thing(): Parent {
    return Child(1, 2);
}

Hi, there are still no plans to add support for value types ?

Hi, I have a C API where I am passing

staticCFunction

handler as a reference to my Kotlin function. I can pass a context (a pointer) to the handler. How to pass more structured data, like data class? Primitives are not enough in my case. Can you advice?

Is it possible for cinterop to also compile the library I'm referencing instead of only generating the bridge code?

Hello, I just upgraded Kotlin to the latest EAP and am unable to export a framework for Xcode. These are the versions I'm using: Kotlin: 1.3.30-eap-125 Kotlin coroutines: 1.1.1-eap13-125 Serialization: 0.11.0-1.3.30-eap-125 Ktor: 1.2.0-alpha-1.3.0-eap-125 This is the error: https://gist.github.com/Thomas-Vos/c2255004d64261d75f7fc715b242f8ee I'm not sure what this error means, could someone let me know what is going wrong?

Are there platform types in Kotlin/Native?

in

.def

file, how can I reference my project’s

.h

files? Nothing like

headers = ./headers/mine.h

does not work. I dont want reference full project path here

Hey, I noticed that if you create a new K/N project with either IntelliJ or CLion, it will build a gradle project using the multiplattform plugin. is the kotlin native gradle plugin deprecated?

I think I found a somewhat interesting problem: I just converted my native project to a mpp as I was having unrelated problems with code completion. I moved my native code to a sourceset I called commonNative. But as this is just a sourceset and not a target, I can't add any cinterop libraries. Compilation still works, but the interop packages are shown as unknown (which is right, the libraries are only known at compile time as they are defined in the actual targets). Any ideas on how I could fix this?

This is now no longer a problem with the lib but my own problem that I would like to solve for future reference. When linking with the original dll it compiles and links just fine

message has been deleted

Is there an alternative in in the kotlin ios target which does the same as

if #available(iOS 11, *) {

?

Hello i've tried to implement http call with ktor in mmp project using this link https://ktor.io/clients/http-client/multiplatform.html, i can get the result but i have no idea how to get the status code, anyone else tried this solution?

Is there any documentation on the annotation

@ObjCMethod(selector, bridge)

? I'm trying to figure out how selectors work with Kotlin/Objective C, as I'm trying to work with UI elements from Kotlin.

Anyone know what we're supposed to link in mingw for the

FOLDERID_Documents

constant/symbol? It's in

platform.windows.*

, but we're getting this linker error:

undefined reference to `FOLDERID_Documents'

What is the simplest implementation of a function that runs on an interval timer in Kotlin/Native? I'm only finding solutions for Kotlin/JVM so far.

Getting the following error while trying to cinterop FirebaseAnalytics:

Task :common-client:linkDebugFrameworkIOS
Undefined symbols for architecture x86_64:
  "_sqlite3_bind_blob", referenced from:
      ___47-[APMSqliteStore bindValues:toStatement:error:]_block_invoke in GoogleAppMeasurement(APMSqliteStore_ae86ae290f270c42720d24e61ec7eef9.o)
....

My

.def

file

linkerOpts

👇

linkerOpts = /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/10.0.1/lib/darwin/libclang_rt.osx.a -framework FirebaseFirestore -framework BoringSSL -framework gRPC-C++ -framework gRPC-Core -framework gRPC-ProtoRPC -framework gRPC-RxLibrary -framework gRPC -framework leveldb-library -framework Protobuf -framework FIRAnalyticsConnector -framework Firebase -framework FirebaseAnalytics -framework FirebaseCore -framework FirebaseCoreDiagnostics -framework FirebaseInstanceID -framework GoogleAppMeasurement -framework GoogleUtilities -framework nanopb -framework Protobuf -framework StoreKit

It seems I’m missing the sqlite3 library, how can I add it?

Has anyone thought about testing c code in Kotlin/Native? pros/cons?

I'm trying to add a custom declaration to my def file to help aid cinterops with a mocking library for iOS. The method is as follows

_Nullable id verify(id mock) {
     return  MKTVerifyWithLocation(mock, self, __FILE__, __LINE__);
}

cinterops throws

error: use of undeclared identifier 'self'

. Is cinterops not able to handle the

self

keyword yet or is there another way I should be handling this?

Hello i just started exploring dependency injection in hybdrid, app any one tried kodein alongside with kotlin native? does it work in ios app?

What am I misunderstanding about K/N Coroutines that is preventing this from ever running:

fun startUiLoop() {
    GlobalScope.launch {
        delay(32L)
        updateUi()
    }
}