On Nov 14, 2011, at 1:40 PM, Ken Thomases wrote:

> But NSAutoreleasePool doesn't drain on an exception, since it doesn't have an 
> explicit scope.  Code posted earlier in this thread used @try-@finally to 
> explicitly drain the pool.  So, while @autoreleasepool would be equivalent to 
> a naive use of NSAutoreleasePool, it's not equivalent to the earlier code.
> 
> Quoting from the Transitioning to ARC Release Notes 
> <http://developer.apple.com/library/mac/#releasenotes/ObjectiveC/RN-TransitioningToARC/_index.html>:
> 
>> On entry, an autorelease pool is pushed. On normal exit (break, return, 
>> goto, fall-through, and so on) the autorelease pool is popped. For 
>> compatibility with existing code, if exit is due to an exception, the 
>> autorelease pool is not popped.

You can always put your @try/@catch block inside the @autoreleasepool block, 
and ensure that it drains normally that way.

Charles_______________________________________________

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