A specialized predicate that you use to compare expressions.
- iOS 3.0+
- macOS 10.4+
- tvOS 9.0+
- watchOS 2.0+
You use comparison predicates to compare the results of two expressions. You create a comparison predicate with an operator, a left expression, and a right expression. You represent the expressions using instances of the
NSExpression class. When you evaluate the predicate, it returns as a
BOOL value the result of invoking the operator with the results of evaluating the expressions.