obj_msgSend function pointer crash when build with 64bit arm64

Question

Actually my original code works great with Xcode 5.0.2 and also great for sending to App Store which is:

objc_msgSend(self.target, self.successAction, category);         


        

Answer 1

Finally, I can reproduce the crash right now. Simply edit Build Scheme and change "Run YOURAPPNAME.app" from Debug to Release.

And right after I can reproduce this bug, I know how to fix it. Since my selector function type is void(does not return anything), I should not just copy what the question does (using "id").

By changing:

id (*response)(id, SEL, id) = (id (*)(id, SEL, id)) objc_msgSend;
response(self.target, self.successAction, category);

To:

void (*response)(id, SEL, id) = (void (*)(id, SEL, id)) objc_msgSend;
response(self.target, self.successAction, category);

It fixes!! Or a one-line code thanks to this commit on github:

((void(*)(id, SEL, id))objc_msgSend)(self.target, self.successAction, category);