for (NSString *familyName in [UIFont familyNames])
            {
                NSLog(@"----------------");
                NSLog(@"FAMILY: %@", familyName);
                for(NSString *fontName in [UIFont fontNamesForFamilyName:familyName])
                {
                    NSLog(@"  %@", fontName);
                }
            }

FAMILY: Helvetica Neue LT Pro
   HelveticaNeueLTPro-MdCn
   HelveticaNeueLTPro-BdCn

MyCustomView *view = [[MyCustomView alloc] init];
//bla bla

- (id) init
{
     //create some labels and set their fonts.
}