Question

I’ve a reload method which handles with highly sensitive core data and I want to implement, that the method can not be executed in parallel.

Is there a simply way to implement something like that?

Update

Maybe it’s a different problem.

So I’ve a pinch-gesture and when a user is doing this gesture I want to execute a method only ONCE!

BUT if I’m simulating it right now in the iOS simulator, the method execution starts when a minimal pinch gesture is recognized and is fired as long as the user holds this pinch gesture.

Is this the default usage?!?!? How can I edit it, that the method is only fired once per pinch gesture independent of how long the user is holding this gesture etc.

Answer 1

Yes there is. Check out the @synchronized directive: http://developer.apple.com/library/mac/#documentation/cocoa/conceptual/ObjectiveC/Chapters/ocThreading.html