I have an array of objects in a tableView. I want the user to be able to go to another page and select from a checklist of objects to filter the first array.
How should I handle the data from the checklist? I am currently handling it as an NSMutableArray of selected objects. But then how do I filter the first array with the contents of another array?
Should I handle each item as a NSString instead?
Thanks for the help!
I would rather use a NSMutableDictionary instead of the second array, associating each object (the key) a value that tells me if it has been selected or not. This way, verifying the selected settings would be faster when I inspect the first array (the one that needs to be filtered).
If your objects implement isEquals:\hash, you can use an NSSet to store the selected objects. Then you can do a set lookup to see if they were selected. You should be able to construct a NSPredicate and filter the array using that.
If possible use NSMutableSets and just use the intersection.
Removes from the receiver each object that isn’t a member of another given set.
- (void)intersectSet:(NSSet *)otherSet
You can create the sets with:
- (id)setWithArray:(NSArray *)anArray
