If you wants to call drive class methods from base class then, declare class method in your drive class like this: using (+) sign before method name.
+(void)myClassMethod;
Call this method from base class like this:
[YourDriveClassName myClassMethod];
Or you wants to call drive class instance methods from base class, declare instance method in your drive class using (-)sign before method name.
-(void)sayHelloToSomeOne:(NSString *)greeting;
Call this method from base class.
[super sayHelloToSomeOne:@"Hello Worlds!"];