I am having some trouble calling an objective-c class method from a C++ file. Example:
In my .h:
@interface MyClass : NSObject { } + (void)myMethod:(NSString *)str; In my .m:
+ (void) myMethod:(NSString *)str { ... } In my .cpp:
?? How can you call myMethod since there is no class instance? Its essentially a static?
Thanks
Objects in C++ are incompatible with objects in Objective-C. You cannot simply call an Objective-C method from C++.
There are some solutions, however:
Use Objective-C++. Rename your .cpp to .mm, then you can use Objective-C syntax in your C++ code: [FlurryAnalytics myMethod: @"foo"];
Use direct calls to the Objective-C runtime system. I won't tell you how to, because I really think you shouldn't, and in fact that you don't want to.
Write a plain-C interface. That is, in some .m file, define void myFunction(const char *str) { ... } and call that from C++. You can find an example of this here.
You're going to need a .mm to call an Objective-C method, rather than a .cpp. Beyond that your comment that 'it's essentially static' is accurate in the sense that you would call it with similar logic to the way you would call static class functions in C++:
[MyClass myMethod:@"Some String"]; Though the method isn't static in the C++ sense for a bunch of reasons that don't affect this answer — it isn't resolved at compile time and it does operate within a class (the MyClass metaclass).
