NSOperation - wait for completion INCLUDING completion block

Question

I know I can call [NSOperation waitUntilFinished] to wait for an NSOperation, but is there a way to include the completionBlock as part of this wait call? Right now I set a BOOL in the completion block to indicate that the operation is finished including the completion block, but surely there must be a better, built in way to do it...

[self.requestOperation setCompletionBlock:^{ self.reallyDone = YES; }];

Answer 1

You don't need a completion block with waitUntilFinished. Just put it on the next line after the call to waitUntilFinished. That next line won't be reached until the operation completes achieving precisely the same functionality as a completion block.

You only need to use completion blocks when you're doing something asynchronously, but if you're invoking the operation synchronously, that obviates the need for completion block.