Comments on: The Unity/Objective-C Divide

By: Yohann (again)

Yohann (again) — Sun, 13 Nov 2011 20:54:23 +0000

Solved the issue. It just happens that iOS5 compiles with LLVM compiler which is pickier on code than the previous one (GCC or GDB can’t recall) which you have to be more careful abut what you write, double check file extensions, headefrs, types, etc…

By: Yohann

Yohann — Sun, 13 Nov 2011 15:44:37 +0000

Hi Jerrod,
Great post!
I started implementing your solution for the advanced unity user using iOS 4.x. And everything worked fine.
Now, upgrading to iOS5, I get this error:

Undefined symbols for architecture armv7:
“_AwesomeFunction”, referenced from:
__Z19RegisterMonoModulesv in RegisterMonoModules.o
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Have you encountered it as well? It’s giving me a headache, the code hasn’t changed. It’s got to be some settings somewhere that needs to be updated. Isn’t it?

By: Bruno Mikoski

Bruno Mikoski — Fri, 09 Sep 2011 15:39:36 +0000

Thanks! Work like a charm!

By: Jerrod Putman

Jerrod Putman — Thu, 08 Sep 2011 17:04:29 +0000

Set up the method in C# as normal:

[DllImport("__Internal")]
public static extern void CoolFunction(string coolString);

And on the native code side create a function like so:

void CoolFunction(const char *coolString)
{
NSString *nsCoolString = [NSString stringWithUTF8String:coolString];

// Cool function code goes here.
}

Hope that helps.

By: Bruno Mikoski

Bruno Mikoski — Thu, 08 Sep 2011 10:50:20 +0000

And how about to send a string from Unity (C#) to Objective-C? I’m trying to implement the Testflightapp SDK in one of my games, but i can’t find how send a string as parameter to a objective C function.

By: Jerrod Putman

Jerrod Putman — Wed, 31 Aug 2011 19:12:43 +0000

There seems to be an issues with mono_get_domain on 3.4, but I’m not certain how to work around it. There are some discussions on the beta list about this, so I’ll update if I found out anything.

By: rwar

rwar — Tue, 30 Aug 2011 20:31:17 +0000

Seems there is an issue with Unity 3.4 and MonoDomain *domain = mono_domain_get(); Not sure how to fix it

By: Ranza

Ranza — Thu, 04 Aug 2011 13:58:46 +0000

I’ve added libmono.0.dylib , but I’m still geting an error
“Undefined symbols for architecture x86_64:
“_mono_domain_get”, referenced from:
__canMakePayments in StoreKitBinding.o
ld: symbol(s) not found for architecture x86_64″
I’ll add that I’m trying to make a Mac bundle for Unity, reusing some prime31 iOS plugins.
Anyone knows how to solve it?

By: Ranza

Ranza — Thu, 04 Aug 2011 10:34:47 +0000

Hey Claire, how did you fix it?
I’m having a similar problem.

By: Claire

Claire — Wed, 20 Jul 2011 08:52:33 +0000

I found the way to solve it. !