in xcode6 gold master, using objc_msgSend now throws a syntax error saying the number of arguments is wrong

Question

 id topLayoutGuideObj = objc_msgSend(viewController, @selector(myselector));

\"Too many arguments to function call, expected 0, h

Answer 1

See just a few lines above you referred.

 /* 
  * ...
  *
  * These functions must be cast to an appropriate function pointer type 
  * before being called. 
  */

You can call it like:

#import 
#import 

id topLayoutGuideObj = ((id (*)(id, SEL))objc_msgSend)(viewController, @selector(myselector));

OR

id (*typed_msgSend)(id, SEL) = (void *)objc_msgSend;
id topLayoutGuideObj = typed_msgSend(viewController, @selector(myselector));