NSPredicate compare syntax objective c

I have the following expression

NSPredicate* predicate = [NSPredicate predicateWithFormat:@"v开发者_C百科alue1== %@", variable1];

I want to expand the above expression to compare two values e.g."if((value1==variable1)&&(value2==variable2))

How is this possible?

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NSPredicate* predicate = [NSPredicate predicateWithFormat:@"value1== %@ && value2 == %@", variable1, varible2];

Check out the predicate programming guide.