predicate
The predicate of the fetch request.
Declaration
var predicate: NSPredicate? { get set }Discussion
The predicate instance constrains the selection of objects the NSFetchRequest instance is to fetch.
If the predicate is empty—for example, if it is an AND predicate whose array of elements contains no predicates—the request has its predicate set to nil. For more about predicates, see Predicate Programming Guide.