I’m pretty new at Xcode and Objective C, so there may not be a one-to-one correspondence here between errors and the most probable cause, but this helps me so it may help you.
This will be a work in progress; I’ll keep adding as I go.
CODE (from header declarations):
CreatorHuntView *detailController;
ERROR:
error: expected specifier-qualifier-list before ‘CreatorHuntView’
TRANSLATION/PROBABLE CAUSE:
You forgot to import the file in the header file; e.g.
#import “CreatorHuntView.h”