调用objc_msgsend警告处理。

Implicitly declaring library function 'objc_msgSend' with type 'id (id, SEL, ...)'

Implicitly library function 'objc_msgSend' with type 'id(id, SEL, ...)' 1.include the header<objc/message.h> or explicitly provide a declaration for 'objc_msgSend'

Too many arguments to function call，expected 0，have 3.

Build Setting->App LLVM 6.1-Preprocessing->Enable Strict Checking of objc_msgSend Call 设置成No。

//objc_msgSend(self,selector,@"test");
((void(*)(id, SEL, id))objc_msgSend)(self, selector, @"test");

- (int) doSomething:(int) x { ... }
- (void) doSomethingElse {
    int (*action)(id, SEL, int) = (int (*)(id, SEL, int)) objc_msgSend;
    action(self, @selector(doSomething:), 0);
}