Question

I have use codedate, I want to use NSPredicate to filter the result. I have a entity, there are three field: from and to. For example:

from to info

aa bb 11111

aa cc y6767

bb aa 4545

bb dd 3434

So I want to get from=aa and to=bb or from =bb and to=aa, so the result is:

from to info

aa bb 11111

bb aa 4545

NSPredicate *predicate = [NSPredicate predicateWithFormat:@”(from ==
%@) AND (to > %@) OR (from == %@) and (to == %@)”,from, to,to ,from];

or NSPredicate *predicate = [NSPredicate predicateWithFormat:@”(from
== %@) AND (to > %@) OR ((from == %@) and (to == %@))”,from, to,to ,from];

Answer 1

Try

 [NSPredicate predicateWithFormat:@"(from == %@ AND to == %@) OR (from == %@ AND to == %@)",
        from, to, to, from]