I am having problems with my NSPredicate

I'm trying the following comparison but it does not work.

What is the appropriate syntax to use both the or/and operator within the same context?

N开发者_开发百科SPredicate* predicate = [NSPredicate predicateWithFormat:@"((day || day2 ==%@) && CourseTitle==%@)",day,courseSelected];
rows = [[courseArray filteredArrayUsingPredicate:predicate]retain];

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Try:

NSPredicate* predicate = [NSPredicate predicateWithFormat:@"(((day == %@) OR (day2 == %@)) && CourseTitle==%@)",day, day, courseSelected];
rows = [[courseArray filteredArrayUsingPredicate:predicate]retain];