kotlinlang #ios

Anyone have common gotcha's for AppCode not really parsing Kotlin code? I'm not seeing any errors highlighted despite Gradle being synced and the Kotlin plugin being installed.

3 replies · 3 participants

andrew

06/10/2019, 10:44 PM

what do you think?

2 replies · 3 participants

darkmoon_uk

06/14/2019, 10:48 AM

To establish the Event Loop required to use Ktor in iOS, should I put the whole content of the

main

function inside

runBlocking

? I'm aware that only the main thread can be used for coroutines at present, and have created a main thread Dispatcher, but launching with this dispatcher - according to the error I'm receiving - does not set up an Event Loop.

1 reply · 2 participants

pardom

06/20/2019, 9:00 PM

Hey, all. Does anyone know how to set the framework name for multiplatform projects which use the cocoapods plugin?

4 replies · 4 participants

Marc Reichelt

07/01/2019, 11:28 AM

We could really need some help 😊

12 replies · 2 participants

Marc Reichelt

07/01/2019, 12:46 PM

Or does anyone have a good Android/iOS Kotlin Multiplatform example? Only requirement is that it has to build with Xcode 10.2.1… 🙂

14 replies · 3 participants

Marc Reichelt

07/04/2019, 1:30 PM

By the way: The example https://github.com/Kotlin/mpp-example works, but it uses Kotlin 1.3.31 native/multiplatform plugins. It seems the change to 1.3.40 is not trivial, and the build breaks if one tries to simply bump up the version. Did anyone try to get

mpp-example

up and running with Kotlin 1.3.40?

10 replies · 3 participants

darkmoon_uk

07/05/2019, 5:18 AM

Can anyone from JB comment on roadmap for Kotlin/Native/iOS in AppCode? The current Kotlin plugin is incompatible with 2019.2 and there's no mention of when it might be fixed... my company are considering making a considerable investment in going down the Kotlin/Multiplatform path for mobile; early experiments are working but we're finding the lack of clarity around IDE support worrying.

👍 1

3 replies · 4 participants

Rainer Schlonvoigt

08/02/2019, 10:59 AM

what's the official way of setting the version number of a kotlin-native iOS framework? Currently it always reports 1.0

7 replies · 3 participants

Hauke Radtki

09/09/2019, 10:18 AM

Is it possible to aquire field references of kotlin classes from objective-c or swift? Like

val prop = SomeClass::property

1 reply · 2 participants

Rainer Schlonvoigt

09/09/2019, 1:49 PM

does not work because

Cannot create binary debugFramework: binary with such a name already exists

4 replies · 2 participants

einar

09/26/2019, 5:36 PM

Has anyone had success with custom build configurations in xcode (those apart from debug and release) together with a MPP shared library? I have created a configuration called PreProd that targets a different server url. When trying to build that configuration in iOS I get

No enum constant org.jetbrains.kotlin.gradle.plugin.mpp.NativeBuildType.PREPROD

. (Im using cocoapods)

8 replies · 2 participants

Steve Young

10/07/2019, 1:39 PM

is this the right way to declare the hidden method? @kotlinx.cinterop.ObjCMethod(“”, “”) external fun NSURLRequest.Companion.setAllowsAnyHTTPSCertificate(allow: Boolean, host: NSString):kotlin.Unit

4 replies · 2 participants

Tim Hauptmann

10/17/2019, 12:12 PM

Hey, when I run the following code on an iOS simulator useCompanion() will produce a runtime crash. The method useInner() works perfect. Furthermore, this only happens when I inherit from UIScrollView. Is this wrongly used? Or is this a bug I should report?

import kotlinx.cinterop.CValue

import kotlinx.cinterop.cValue

import kotlinx.cinterop.useContents

import platform.CoreGraphics.CGRect

import platform.UIKit.NSDirectionalEdgeInsetsMake

import platform.UIKit.UIScrollView

class Test(frame: CValue<CGRect>) : UIScrollView(frame) {

private val innerInsets = NSDirectionalEdgeInsetsMake(top = 15.0, leading = 8.0, bottom = 15.0, trailing = 8.0)

companion object {

private val companionInsets = NSDirectionalEdgeInsetsMake(top = 15.0, leading = 8.0, bottom = 15.0, trailing = 8.0)

fun useInner(): Double {

return innerInsets.useContents { top } //This line works

fun useCompanion(): Double {

return companionInsets.useContents { top } //This line produces runtime crash on iOS Simulator: Thread 1: EXC_BAD_ACCESS

4 replies · 2 participants

JoakimForslund

10/23/2019, 1:25 PM

So basicly, I have recently had to add support for armv7 and i have data classes that gets translated from json. These data classes contains Long i order to handle big values. Now trying to run this framework in xode I get

Undefined symbols for architecture armv7:
  "_OBJC_CLASS_$_KotlinLong", referenced from:
      objc-class-ref in TestViewController.o

Is there anything to do about that?

2 replies · 2 participants

Dmitri Sh

10/24/2019, 1:10 AM

reposting from the general channel, as no answers, maybe better luck here? Hi. A multiplatform project, android and iOS. In common code, I have an interface -

interface Idea

. When in Swift, want to have a struct implement this interface, a.k.a now as protocol in the Swiftland. Get a compiler error -

inheritance from non-protocol type 'Idea'.

In the generated objective-c file I see this -

__attribute__((objc_subclassing_restricted))

. Reading on it, all objective c protocols are restricted to classes. So how I do get around this problem - or no getting around and have to use classes in Swift😥?

5 replies · 4 participants

Konstantin Petrukhnov

10/28/2019, 12:23 PM

Is it possible to refer to resource file that is inside ".framework" bundle, from arm64/x64 source? E.g. mpp library project, that have sources and few resource files. In jvm files inside jar could be access through classpath, but is it possible to do similar on ios? Now I'm using Bundle.url(forResource) in swift, and then pass path string to kotlin, that will access file.

22 replies · 3 participants

Rainer Schlonvoigt

11/08/2019, 12:57 PM

is there a specific reason for that? will stuff break if we override this setting?

2 replies · 2 participants

Tim Hauptmann

11/14/2019, 9:36 AM

Hey, I have a Kotlin multiplatform project which creates an Xcode-framework. I want to draw a class dependency graph of the framework. I found this tool for pure Objective-C sources https://github.com/nst/objc_dep And there are many tools out there which can process a .jar. Somebody knows a tool which can process an Xcode-framework or the Kotlin source files?

6 replies · 2 participants

darkmoon_uk

11/17/2019, 10:51 PM

message has been deleted

1 reply · 2 participants

Konstantin Petrukhnov

11/19/2019, 4:42 PM

Going back to my problem with text file inside bundle. Now I have dynamic library, and calling next code in Swift resolved to kotlin framework:

let b1 = Bundle(for: KotlinInt.self).bundlePath

But calling similar code in Kotlin code resolved to main app bundle (same with specific MyClass that inside framework):

val bundle1 = NSBundle.bundleForClass(object_getClass(Int)!!).bundlePath

Calling to get all bundles, successfully resolve all bundles as list:

val bundle7 = NSBundle.allBundles().joinToString { (it as NSBundle).bundlePath }

Is there some better way, than iterate through all bundles and try to find resource in each of it?

(bundle as NSBundle).pathForResource(fileName, null)

9 replies · 3 participants

ribesg

11/25/2019, 3:21 PM

How to you read from a

NSInputStream

into a

ByteArrayChannel

without filling the RAM? Anyone got an example of that? I’ve got something which does not seem to work and even freezes the app with bigger files

2 replies · 1 participant

Andreas Jost

11/26/2019, 10:20 AM

Hi guys, I just realized there is a dedicated ios channel. Let me copy-paste my question from kotlin-native: Can anybody help me, how to add a GestureRecognizer to a UIView from Kotlin? I'm trying to achieve the ability to start a function (passed as a lambda), when a View is pressed. Here is what I tried: (ViewContainer is a typealias for UIView, I want to use this in the common presenter of an Android/iOS-Multiplatform project)

actual fun ViewContainer.setOnCLickListener(block: () -> Unit) {
    val funRef = StableRef.create(InvokeClickListener(block))

    this.addGestureRecognizer(UITapGestureRecognizer(this, funRef.asCPointer()))
}

class InvokeClickListener(private val block: () -> Unit) : () -> Unit {
    override operator fun invoke() {
        block()
    }
}

I already managed to set the visibility of Views in the common code. If interested I can post code snippets in the multiplatform channel. But this case is harder, because UITapGestureRecognizer wants a selector/COpaquePointer and I can't find a solution. Error: 'NSInvalidArgumentException', reason: '(null): unrecognized selector sent to instance 0x7f9da94c0a00' Thanks in advance!

7 replies · 3 participants

Andreas Jost

12/05/2019, 1:30 PM

Hi, has anybody tried to use the Keychain Services API from Kotlin? I hoped it'd be possible to translate that to Kotlin: https://agostini.tech/2017/03/06/creating-a-simple-keychain-wrapper/ Here is an example of CFDictionary with Kotlin: https://github.com/JetBrains/kotlin-native/issues/3013 But I'm stuck, here are my thoughts:

fun keychainQuery(key: String) = 
    CFDictionaryCreateMutable(null, 5, null, null).also {
        CFDictionaryAddValue(it, kSecClassGenericPassword, kSecClass)
        CFDictionaryAddValue(it, key.cstr, kSecAttrService)
        CFDictionaryAddValue(it, kSecAttrAccessibleWhenUnlockedThisDeviceOnly, kSecAttrAccessible)
    }

fun load(key: String) : String {
    val query = keychainQuery(key)
    
    CFDictionaryAddValue(query, kCFBooleanTrue, kSecReturnData)
    CFDictionaryAddValue(query, kCFBooleanTrue, kSecReturnAttributes)

    memScoped {
        val result: CFTypeRefVar = alloc()
        val status = SecItemCopyMatching(query, result.ptr)
        
        val resultsDict = result as CFDictionaryRef // <-- This cast can never succeed
        val resultsData: COpaquePointer? = CFDictionaryGetValue(result, kSecValueData)
    }
}

10 replies · 4 participants

Hauke Radtki

12/06/2019, 2:25 PM

Are default parameter values not supported in swift/ios interop?

class Foo(val ref: () -> Long = ::defaultReference)

does not allow Foo to be instantiated in iOS without specifying a value for

ref

4 replies · 2 participants

ribesg

12/11/2019, 10:29 AM

Anyone knows a good up to date tutorial on how to create a 100% Kotlin iOS app (not just a framework) ?

22 replies · 7 participants

kpgalligan

12/11/2019, 10:22 PM

Anybody see this doing a release build with 1.3.61?

e: java.lang.IllegalStateException: no implementation for @kotlin.native.SymbolName public final external fun compareAndSet(expected: T, new: T): kotlin.Boolean defined in kotlin.native.concurrent.AtomicReference[DeserializedSimpleFunctionDescriptor@3a66e67e]

3 replies · 2 participants

Cristián Arenas

01/05/2020, 2:57 AM

How do I create an

NSRange

in Kotlin? I can’t find

init(location: Int, length: Int)

, I can only find a constructor that requires a

kotlinx.cinterop.NativePtr

🤔

1 reply · 1 participant

gonzooin

01/08/2020, 2:42 PM

Hello, i’m trying to call addTarget on an UITextField but it crash at runtime. Kotlin code

init {
        uiView.searchTextField.addTarget(this, platform.darwin.sel_registerName("searchTextChanged"), UIControlEventEditingChanged)
    }

    @ObjCAction
    private fun searchTextChanged() {
        // some code 
    }

iOS Crash

2020-01-08 15:34:46.891004+0100 Production[69085:8719071] -[kobjcc0 searchTextChanged]: unrecognized selector sent to instance 0x6000036b1620
2020-01-08 15:34:46.897007+0100 Production[69085:8719071] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[kobjcc0 searchTextChanged]: unrecognized selector sent to instance 0x6000036b1620'
*** First throw call stack:
(
	0   CoreFoundation                      0x00007fff23c7127e __exceptionPreprocess + 350
	1   libobjc.A.dylib                     0x00007fff513fbb20 objc_exception_throw + 48
	2   CoreFoundation                      0x00007fff23c91fd4 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
	3   CoreFoundation                      0x00007fff23c75c4c ___forwarding___ + 1436
	4   CoreFoundation                      0x00007fff23c77f78 _CF_forwarding_prep_0 + 120
	5   UIKitCore                           0x00007fff48093fff -[UIApplication sendAction:to:from:forEvent:] + 83
	6   UIKitCore                           0x00007fff47a6c00e -[UIControl sendAction:to:forEvent:] + 223
	7   UIKitCore                           0x00007fff47a6c358 -[UIControl _sendActionsForEvents:withEvent:] + 398
	8   UIKitCore                           0x00007fff4839655f -[UITextField fieldEditorDidChange:] + 202
	9   UIKitCore                           0x00007fff4837b53a -[UIFieldEditor textInputDidChange:] + 61
	10  UIKitCore                           0x00007fff483a6d45 -[UITextInputController _sendDelegateChangeNotificationsForText:selection:] + 104
	11  UIKitCore                           0x00007fff483a9628 -[UITextInputController _insertText:fromKeyboard:] + 765
	12  UIKitCore                           0x00007fff483aa07f -[UITextInputController insertText:] + 336
	13  UIKitCore                           0x00007fff4837ec97 -[UIFieldEditor insertFilteredText:] + 838
	14  UIKitCore                           0x00007fff4839c5e3 -[UITextField insertFilteredText:] + 93
	15  UIKitCore                           0x00007fff47ea906b -[UIKeyboardImpl insertText:] + 147
	16  UIKitCore                           0x00007fff47ea3863 -[UIKeyboardImpl _performKeyboardOutput:shouldCheckDelegate:] + 1059
	17  UIKitCore                           0x00007fff47ea24bd __55-[UIKeyboardImpl handleKeyboardInput:executionContext:]_block_invoke_2 + 372
	18  UIKitCore                           0x00007fff47ed1ab1 -[UIKeyboardTaskEntry execute:] + 147
	19  UIKitCore                           0x00007fff47ed05c7 -[UIKeyboardTaskQueue continueExecutionOnMainThread] + 310
	20  Foundation                          0x00007fff25781c30 __NSThreadPerformPerform + 259
	21  CoreFoundation                      0x00007fff23bd4471 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
	22  CoreFoundation                      0x00007fff23bd439c __CFRunLoopDoSource0 + 76
	23  CoreFoundation                      0x00007fff23bd3b74 __CFRunLoopDoSources0 + 180
	24  CoreFoundation                      0x00007fff23bce87f __CFRunLoopRun + 1263
	25  CoreFoundation                      0x00007fff23bce066 CFRunLoopRunSpecific + 438
	26  GraphicsServices                    0x00007fff384c0bb0 GSEventRunModal + 65
	27  UIKitCore                           0x00007fff48092d4d UIApplicationMain + 1621
	28  Production                          0x000000010c1b1359 platform_UIKit_UIApplicationMain_wrapper64 + 89
	29  Production                          0x000000010c10a7cb kfun:main(kotlin.Array<kotlin.String>) + 1371
	30  Production                          0x000000010c10ab1c Konan_start + 156
	31  Production                          0x000000010c17249f Init_and_run_start + 111
	32  libdyld.dylib                       0x00007fff5227ec25 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

my code is inspired from KotlinFinder project ( https://github.com/JetBrains/KotlinFinder/blob/master/ios-app/src/iosMain/kotlin/Views/CollectWordView.kt )

4 replies · 2 participants

Title

gonzooin

01/08/2020, 2:42 PM

Hello, i’m trying to call addTarget on an UITextField but it crash at runtime. Kotlin code

init {
        uiView.searchTextField.addTarget(this, platform.darwin.sel_registerName("searchTextChanged"), UIControlEventEditingChanged)
    }

    @ObjCAction
    private fun searchTextChanged() {
        // some code 
    }

iOS Crash

2020-01-08 15:34:46.891004+0100 Production[69085:8719071] -[kobjcc0 searchTextChanged]: unrecognized selector sent to instance 0x6000036b1620
2020-01-08 15:34:46.897007+0100 Production[69085:8719071] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[kobjcc0 searchTextChanged]: unrecognized selector sent to instance 0x6000036b1620'
*** First throw call stack:
(
	0   CoreFoundation                      0x00007fff23c7127e __exceptionPreprocess + 350
	1   libobjc.A.dylib                     0x00007fff513fbb20 objc_exception_throw + 48
	2   CoreFoundation                      0x00007fff23c91fd4 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
	3   CoreFoundation                      0x00007fff23c75c4c ___forwarding___ + 1436
	4   CoreFoundation                      0x00007fff23c77f78 _CF_forwarding_prep_0 + 120
	5   UIKitCore                           0x00007fff48093fff -[UIApplication sendAction:to:from:forEvent:] + 83
	6   UIKitCore                           0x00007fff47a6c00e -[UIControl sendAction:to:forEvent:] + 223
	7   UIKitCore                           0x00007fff47a6c358 -[UIControl _sendActionsForEvents:withEvent:] + 398
	8   UIKitCore                           0x00007fff4839655f -[UITextField fieldEditorDidChange:] + 202
	9   UIKitCore                           0x00007fff4837b53a -[UIFieldEditor textInputDidChange:] + 61
	10  UIKitCore                           0x00007fff483a6d45 -[UITextInputController _sendDelegateChangeNotificationsForText:selection:] + 104
	11  UIKitCore                           0x00007fff483a9628 -[UITextInputController _insertText:fromKeyboard:] + 765
	12  UIKitCore                           0x00007fff483aa07f -[UITextInputController insertText:] + 336
	13  UIKitCore                           0x00007fff4837ec97 -[UIFieldEditor insertFilteredText:] + 838
	14  UIKitCore                           0x00007fff4839c5e3 -[UITextField insertFilteredText:] + 93
	15  UIKitCore                           0x00007fff47ea906b -[UIKeyboardImpl insertText:] + 147
	16  UIKitCore                           0x00007fff47ea3863 -[UIKeyboardImpl _performKeyboardOutput:shouldCheckDelegate:] + 1059
	17  UIKitCore                           0x00007fff47ea24bd __55-[UIKeyboardImpl handleKeyboardInput:executionContext:]_block_invoke_2 + 372
	18  UIKitCore                           0x00007fff47ed1ab1 -[UIKeyboardTaskEntry execute:] + 147
	19  UIKitCore                           0x00007fff47ed05c7 -[UIKeyboardTaskQueue continueExecutionOnMainThread] + 310
	20  Foundation                          0x00007fff25781c30 __NSThreadPerformPerform + 259
	21  CoreFoundation                      0x00007fff23bd4471 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
	22  CoreFoundation                      0x00007fff23bd439c __CFRunLoopDoSource0 + 76
	23  CoreFoundation                      0x00007fff23bd3b74 __CFRunLoopDoSources0 + 180
	24  CoreFoundation                      0x00007fff23bce87f __CFRunLoopRun + 1263
	25  CoreFoundation                      0x00007fff23bce066 CFRunLoopRunSpecific + 438
	26  GraphicsServices                    0x00007fff384c0bb0 GSEventRunModal + 65
	27  UIKitCore                           0x00007fff48092d4d UIApplicationMain + 1621
	28  Production                          0x000000010c1b1359 platform_UIKit_UIApplicationMain_wrapper64 + 89
	29  Production                          0x000000010c10a7cb kfun:main(kotlin.Array<kotlin.String>) + 1371
	30  Production                          0x000000010c10ab1c Konan_start + 156
	31  Production                          0x000000010c17249f Init_and_run_start + 111
	32  libdyld.dylib                       0x00007fff5227ec25 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

my code is inspired from KotlinFinder project ( https://github.com/JetBrains/KotlinFinder/blob/master/ios-app/src/iosMain/kotlin/Views/CollectWordView.kt )

Andreas Jost

01/08/2020, 2:51 PM

Can you try NSSelectorFromString("searchTextChanged") instead of platform.darwin.sel_registerName? It's part of the platform.Foundation library.

gonzooin

01/08/2020, 2:52 PM

I’m trying 🙂

same error sadly

The problem was the method “searchTextChanged” wasn’t in a NSObject subclass !

👍 2

View count: 4