Question

The function that I want queued takes no parameters. What do I pass in as paramContext? Passing in NULL generates the compile error “Invalid use of void expression”. I do not want to add a parameter to my function just to make it compile – how do I make this work?

Mac OS X Snowleopard, Xcode 3.2.6 with Objective-C

Answer 1

You need to wrap the function somehow. The easiest way is actually to use dispatch_async() instead, as in

dispatch_async(queue, ^{ myFunc() });