Here's what you want:
>
> __block BOOL exists;
> dispatch_sync(dispatch_get_main_queue, ^{
> NSManagedObjectContext *context = … // grab the context
> exists = … // query the context to see if the data already exists
> });
Thanks Mike, that works very nice.
Unfortunately, after all the importing, I now end up with an empty
table in my UI, so with all the thread switches I must be forgetting
something. (it worked fine when just using the main thread).
So is there a way in Xcode to follow threads and (visually) get an
idea about what happens on each one, so I can debug this? I have seen
all the threads pop up in the left column during the execution, but I
find that kinda difficult to follow.
- Koen.
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