UI Freezing when NSPredicate changes with Core Data

Question

I've problem regarding to UI freezing when I pressed a button that try to change NSPredicate for Core Data fetch object it will hang for a while before it shows all of the data. This is especially when loading a tons of retrieve data.

As other app that load a lot of processing by pressing a button.

How do I should make the button that fires one operation by one operation? For example start the indicator, then mining the fetch object, then stop the indicator.

Thanks in advance.

Answer 1

You could have predicate change occur in background using the following NSObject method: - (void)performSelectorInBackground:(SEL)aSelector withObject:(id)arg