Hi, I am trying to integrate an iOS framework using cinterop but it is not quite working. In gradle ...

# multiplatform

[Peter Tran]

Hi, I am trying to integrate an iOS framework using cinterop but it is not quite working.
In gradle I have two modules, :composeApp and :shared. And in :shared I use cinterops to integrate an Obj-C framework, with separate cinterops invocation for iosArm64 and iosSimulatorArm64.

The tests, i.e. commonTest, in :shared, successfully call expect/actual functions that exercise the Obj-C framework code. However, there is code in :composeApp that calls `:shared`'s expect/actual functions. It builds and runs, but fails at runtime with this error:

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_VersionInfo", referenced from:
       in ComposeApp.framework.o
ld: symbol(s) not found for architecture arm64

Any ideas?

[Peter Tran]

Would I need to somehow manually update the xcode project, i.e. iosApp/iosApp.xcodeproject?

[Dennis]

Getting similar error too Undefined symbols for architecture x86_64:
“_OBJC_CLASS_$_NBPhoneNumberUtil”, referenced from:
objc-class-ref in common(Common.framework.o)
ld: symbol(s) not found for architecture x86_64

[Peter Tran]

I suspect the xcodeproj needs to be opened in Xcode and manually updated.

[Peter Tran]

image.png

[Peter Tran]

image.png

[Peter Tran]

I added an entry for to the obj-c framework and made a little progress.
I now get a different error at runtime:

Custom.framework did not have a CFBundleIdentifier in its Info.plist

[Peter Tran]

Success! Here are the steps I used:
• Manual update the xcodproj as shown in screenshots above ^^^
• Ensure Info.plist has a proper CFBundleIdentifier
I am using my own custom obj-c framework, if you're using a third-party framework then most likely CFBundleIdnetifier is already set properly.

[Dennis]

Thank you for sharing @Peter Tran