Question

I have a NSObject defined with a few properties and to keep this question simple, let’s say the object is called Vehicle and there are three properties: Manufacturer, Model, Year.

I read all vehicles from a database and the result is a NSMutableArray of Vehicle objects.

I am trying to create a new array of vehicles that are filtered by manufacturer where the object = “Ford”.

Is the correct approach:

NSPredicate *fordMotorCarsPredicate = [NSPredicate predicateWithFormat:@"ANY   Vehicle.Manufacturer = %@", @"Ford"];

fordMotorCarsArray = [listOfVehicles filteredArrayUsingPredicate:fordMotorCarsPredicate];

I know I could filter the list using an SQL query, but I’d like to know whether this can be achieved in Objective-C code.

Any ideas?
Cheers,
Ross.

Answer 1

If each object in the mutable array has a manufacturer property then predicate should be

 [NSPredicate predicateWithFormat:@"manufacturer = %@", @"Ford"];