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How can logging to Crashlytics be done from C++ code on iOS?

The Crashlytics documentation for iOS only mentions custom logging from Swift and Objective-C. It mentions nothing about doing this from C++. On Android, we can use the log() and set() functions from the Crashlytics native header to do logging from C++ code called through the JNI. Is there an equivalent method for iOS? Is there any other way to do it?

Solution

  • Yep, I don't think there is a C-function for that but I had the problem some time ago and I used a function pointer. So here it is.

    In the C scope (.cpp and .h file)

        void yourCFunction(void (*logFunc)(const char*) = NULL);

    In the ObjectiveC scope:

    CYourCClass *yourCClass = [...];
yourCClass->yourCFunction( [](const char* t){
    CLS_LOG(@"%s", t);
});

    To call the log function in C++:

    if (logFunc!=NULL) {
    std::string debugChr("Some message");
    (*logFunc)(debugChr.c_str());
}

    This can be improved using macro and stuff but you have the idea.