> On 2 Jan 2015, at 12:48 pm, Quincey Morris 
> <quinceymor...@rivergatesoftware.com> wrote:
> 
> **** That usually means the block and the ‘self’ it captured mutually refer 
> to each other. I’m betting this is what’s wrong in your case.
> 
> 


Quincey, thanks for your lengthy and well-thought-out reply (as usual) :)

I think you've hit the nail straight on the head (as usual), with the 
block/self problem. It's one I knew about before, but had forgotten again in my 
excitement at getting the code running. The question is what to do about it.

My handler block refers to 'self' quite extensively - it calls other methods of 
self and also refers to properties such as self.delegate. I'm not quite sure 
how I can rework it not to refer to self. Maybe I just need to not use the 
completion block approach and use a delegate callback instead. I need to go 
away and think about this... thanks for the slap about the head.

--Graham





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