objective-c-blocks

I would like to add functions by creating a category for Objective-C Blocks. __block int (^aBlock)(int) = ^int( int n ){ if( n <= 1 ) return n; return aBlock( n - 1 ) + aBlock( n - 2 ); }; Instead of just allowing the normal [aBlock copy] , [aBlock retain] , [aBlock release] , [aBlock autorelease] . I could do thing like: [aBlock mapTo:anArray]; Possible Category @interface UnknownBlockClass (map) - (NSArray *)mapTo:(NSArray *)array_; @end @pwc is correct in that you can't create a category for a class that you can't see. However... WHAT I AM ABOUT TO TELL YOU SHOULD BE USED STRICTLY AS AN

Update: I tried writing it without making it weak, and there doesn't seem to be a leak. So maybe the question is no longer necessary. In Objective-C ARC, when you want to have a closure be able to use itself inside of the closure, the block cannot capture a strong reference to itself, or it will be a retain cycle, so instead you can make the closure capture a weak reference to itself, like so: // This is a simplified example, but there are real uses of recursive closures int (^fib)(int); __block __weak int (^weak_fib)(int); weak_fib = fib = ^(int n) { if (n < 2) return n; else return weak_fib

I thought I understood the usage of self in a block that is copied is a no no . But in an attempt to clean my code i enabled a bunch of warnings in Xcode, one called "Sending messages to weak pointers" so now in all my blocks, every time I use my created weakself reference __weak typeof(self) weakself = self; I get this warning: Weak receiver may be unpredictably set to nil a trivial example: __weak typeof(self) weakself = self; [aClass doSomethingInABlock:^{ [weakself doSomething]; //warning. }]; I have seen answers which define a version of self within the block like so: __weak typeof(self)

Possible Duplicate: Caret in objective C What does this ^ syntax mean in Objective-C? I am tired by searching the meaning of symbol ^ in Objective C. I have seen it in lot of projects especially in back ground running tasks. I will put a link http://developer.apple.com/library/ios/#samplecode/StitchedStreamPlayer/Introduction/Intro.html#//apple_ref/doc/uid/DTS40010092 and in MyStreamingMovieViewController.m you can find the following inside - (IBAction)endScrubbing:(id)sender method . timeObserver = [[player addPeriodicTimeObserverForInterval:CMTimeMakeWithSeconds(tolerance, NSEC_PER_SEC)

DISCLAIMER: This is a long post, but could prove very valuable for those grappling with using the new ObjectiveC JavascriptCore framework and doing asynchronous coding between ObjC and JS. Hi there, I'm super new to Objective C and am integrating a javascript communication library into my iOS app. Anyway, I've been trying my hand at using the new ObjectiveC JavaScriptCore Framework introduced in iOS7. It's pretty awesome for the most part, though quite poorly documented so far. It's really strange mixing language conventions, but also kind of liberating in some ways. I should add that I am of