ios4 - Core Data fetch by property count -

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I'm just trying to get the object that contains a large number of nsset, then in Core Data 0 something like this

Get all the items, which are the object.set & gt;

"Text">

I was able to find a way to work: 

  NSPredicate * predicate = [NSPredicate predicateWithFormat: @ "Set. @ Count> 0"];   
 If there is a better way, please tell me, I am posting here to help anyone with the same problem.  
 Thanks

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