Trying to integrate C++ code into a Swift framework project with XCode - fails

Question

I'm trying to integrate C++ code (fuzzylite.com) into a Swift framework project and I keep receiving build errors. From what I understand, you cannot use a bridging header in Swift framework projects, rather you need to include the source in the Umbrella headers. I wrapped the C++ code in Objective-C classes and then included the Objective-C headers in the umbrella header as such:

#import <Fuzzylite/ObjCWrapper.h>

Followed all the steps as mentioned here ( Clarification on adding Objective C code to a swift dynamic framework ) but it doesn't really work because it is not able to find the Objective-C wrapped C++ framework. Any help is highly appreciated!

Answer 1

Solved it by doing the following:

1. Added C++ source directory into XCode project
2. Expose C function wrappers to C++ instance methods

3. Created C header file wrapper for the C++ project like such:

    #ifndef Header_h #define Header_h #ifdef __cplusplus extern "C" { #endif void hello(char *str); #ifdef __cplusplus } #endif #endif /* Header_h */

4. In the Umbrella header file (in my case the name of the Umbrella header file was 'TestSDK.h') for the framework project (remember that since this was a framework target, there was no bridging header involved as is the case when building an app), I put the following.:

    #ifdef __cplusplus #import "fuzzylite/fl/Headers.h" #endif

5. Added the -I/ to XCode->Target->Build Settings->Other C Flags. In my case, the path was:

    -I$(PROJECT_DIR)/TestSDK/fuzzylite/

This worked for me. Without step 5, I was getting path include errors.