Question

I’m a new user of the data model editor in XCode 4. How do I delete a Fetch Request which I don’t want? It was difficult to figure out how to add one (click and hold the “Create Entity” button!). But now that I’ve created one, I can’t for the life of me figure out how to get rid of it.

I’d also appreciated pointers to a good tutorial on building predicates. eg something which answer how do you test if the year in a date attribute == something and similar questions.

Answer 1

1. Select the fetch request.
2. Hit delete or backspace.

Enjoy.

PS: Instead of 2. you can also choose Delete from the Edit menu.
Remarkably, this command has been around since 1984. 😉

As for your other question: check out Apple’s Predicate Programming Guide.
To search for a year in a date you do something like

[NSPredicate predicateWithFormat:
   @"date > %@ AND date < %@", janFirstYear1, janFirstYear2];