Hi there, My name is Umar, I am from India Nice meeting you to all worlds best developers I have a ...

# multiplatform

[Umar Ata]

Hi there,
My name is Umar, I am from India
Nice meeting you to all worlds best developers

I have a question
I actually transformed one of my android application logic code to kotlin multiplatform
Problem: When the iOS developer needs the logic code I need to execute the command
*cd* "$SRCROOT/.."
./gradlew :shared:packForSimulator -PXCODE_CONFIGURATION=${CONFIGURATION}



shared is the name of my multiplatform module
I am sharing the common code between Android and iOS
so the problem is that whenever I run above command from runScript of XCode it actually builds the framework for Selected device like either iPhone device or iPhone Simulator and it never gives me one framework that runs on both iOS device and simulator

[Kris Wong]

you need to create a fat framework task https://medium.com/vmware-end-user-computing/building-an-ios-fat-framework-for-a-kotlin-multiplatform-project-4f2e0b5de2aa

[Umar Ata]

Thank you, I want to know that if I use Fat framework so can I use same in Android?

[Kris Wong]

i don't understand the question. Android doesn't use frameworks.

[Umar Ata]

I have one android app, I want the same logic in both iOS and Android, so I copied my logic code in newly created shared multiplatform module and in Android I am using it as a project dependency like

implementation project(':shared')

and for iOS I use script to generate xcode-frameworks

[Umar Ata]

and then use it in there

[Umar Ata]

I don’t want to code separate framework for iOS, I only want to make framework that runs for both iOS device and simulator

[Umar Ata]

for now I created two functions in gradle each for iOS device and simulator

[Umar Ata]

val packForXCode by tasks.creating(Sync::class) {
    group = "build"
    val mode = System.getenv("CONFIGURATION") ?: "DEBUG"
    //val sdkName = System.getenv("SDK_NAME") ?: "iphonesimulator"
    val targetName = "iosArm64"//+  if (sdkName.startsWith("iphoneos")) "Arm64" else "X64"
    val framework = kotlin.targets.getByName<KotlinNativeTarget>(targetName).binaries.getFramework(mode)
    inputs.property("mode", mode)
    dependsOn(framework.linkTask)
    val targetDir = File(buildDir, "xcode-frameworks")
    from({ framework.outputDirectory })
    into(targetDir)
}
val packForSimulator by tasks.creating(Sync::class) {
    group = "build"
    val mode = System.getenv("CONFIGURATION") ?: "DEBUG"
    val sdkName = /*System.getenv("SDK_NAME") ?: */"iphonesimulator"
    val targetName = "ios" +/*+ if (sdkName.startsWith("iphoneos")) "Arm64" else*/ "X64"
    val framework = kotlin.targets.getByName<KotlinNativeTarget>(targetName).binaries.getFramework(mode)
    inputs.property("mode", mode)
    dependsOn(framework.linkTask)
    val targetDir = File(buildDir, "xcode-frameworks")
    from({ framework.outputDirectory })
    into(targetDir)
}

[Umar Ata]

so when I want to generate framework for iPhone device I use
./gradlew shared:packFor XCode

and for simulator I use
./gradlew shared:packForSimulator

[Umar Ata]

in this way I don’t need to select iPhone or Simulator in XCode

[georg]

You could also create an XCFramework. It contains both the framework for the device and the simulator. I created a Gradle plugin that can do that for you. Check it out on Github: https://github.com/ge-org/multiplatform-swiftpackage

[Kris Wong]

a normal framework file contains the same. there's no need for a plugin

[georg]

With a fat framework you need to remove the unused architectures (i.e. simulator) before uploading to the App Store. Otherwise Apple will reject the binary. An xcframework does not require this step

[Kris Wong]

gotcha

[Kris Wong]

or just use the coacoapods plugin and don't worry about it

[georg]

True. It takes care of removing the simulator frameworks. But then you’re stuck with Cocoapods 😉
There are plenty of options out there. Just pick whatever suits your needs

[Umar Ata]

So if I setup cocoa pods for my framework then I don’t need to generate framework?

[Umar Ata]

but then it will become publicly available ?

[georg]

It wont’t be public unless you publish it. There’s a nice article by Jetbrains about the integration of Cocoapods and KMP. https://kotlinlang.org/docs/reference/native/cocoapods.html

[Umar Ata]

okay