I\'m trying to make sections in a table view based on the alphabet and sort my entries alphabetically under these sections.
I have collected the first letter in every en
Do you mean that bandsArray is an array of dictionaries? If so, and assuming each dictionary has a name key, you should be able to change the predicate to something like @"SELF.name beginswith[c] %@".
If, on the other hand, bandsArray is actually a dictionary itself, maybe you want to do [[bandsArray allKeys] filteredArrayUsingPredicate...].