gistfile1.m

@implementation  SomeVC

- (void)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)path
{
    ... cell = ....;
    [self configureCell:cell forIndexPath:path];
    return cell;
}

- (void)configureCell:(MyRatingCell*)cell forIndexPath:(NSIndexPath*)path
{
    cell.numberOfStars = [self.ratingsController starCountAtIndexPath:path];
    cell.body = [self.ratingsController reviewBodyAtIndexPath:path];
    cell.name = [self.ratingsController usernameAtIndexPath:path];
    cell.date = [self.ratingsController reviewedDateAtIndexPath:path];
}

@end

@interface RatingsController : NSObject
// all the selectors we use here + an initializer that takes a piece of model data, i.e., an array
@end

@implementation RatingsController

- (instancetype)initWithArray:(NSArray*)array
{
    if((self = [super init]))
        _array = [array copy];
    return self;
}

- (NSUInteger)starCountAtIndexPath:(NSIndexPath*)path
{
    return [[self.array[path.row] stars] unsignedIntegerValue];
}

// ...

@end