Hmm. In partial answer to my own question, the taskIdentifier cannot be used, 
because it seems to restart every session.

I guess I could put something in the taskDescription, but that's documented as 
being human-readable.

> On Feb 9, 2015, at 17:37 , Rick Mann <[email protected]> wrote:
> 
> It seems that the NSURLSession API is missing a very important piece: a 
> mechanism for associating context with a background task.
> 
> With my NSURLConnection-based code, I essentially created a generic delegate 
> for each connection, which was responsible for invoking blocks for the 
> various connection events. The blocks then captured the necessary context.
> 
> But with a background session, my app may be re-launched and have no 
> in-memory context, so I need to resurrect that context from the NSURLSession 
> and tasks API. I can't set the identifier of tasks (as far as I can tell), 
> but I suppose I could use the provided task identifier, if it's guaranteed to 
> be unique even after a task is complete.
> 
> Here's the thing. I'll have to persist that identifier along with enough 
> information to reconstruct my context. If NSURLSession re-uses those 
> identifiers, then I won't be able to reliably reconstruct the correct context.
> 
> Suggestions? Thanks,
> 
> -- 
> Rick Mann
> [email protected]
> 
> 
> 
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-- 
Rick Mann
[email protected]



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