I have an NSArray that I want to filter out certain objects using an NSPredicate, I was hoping I could use NOT IN since I saw that I can easily do an IN.
So I have my array:
Then I get the values I want to remove:
NSArray *parentIDs = [self.cateoriesList valueForKeyPath:@"@distinctUnionOfObjects.ParentCategoryID"];
This gives me a list of ParentCategoryID’s for categories I DO NOT want to display, so I figure I can use an NSPredicate to remove them:
self.cateoriesList = [self.cateoriesList filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"CategoryID NOT IN %@",parentIDs]];
reason: 'Unable to parse the format string "CategoryID NOT IN %@"'
If I wanted to use just IN that works perfectly of course.
NOT (CategoryID IN %@)?
How about using
[NSPredicate predicateWithFormat:@"NONE CategoryID IN %@", parentIDs];