Coredata performBlock then return the new value

Question

How to return the new object saved in coredata if I am using performBlock to save a managedObjectContext?

The requirement is, add an entry in coredata,

Answer 1

I did some research and found that was not too difficult to fix this issue:

I replaced performBlock with performBlockAndWait and it worked.

Reason is straightforward: performBlock is asynchronous, while performBlockAndWait is synchronous.