gistfile1.m

//
//  EtsyStarsView.m
//  Etsy
//
//  Created by Lacy Rhoades on 1/30/14.
//  Copyright (c) 2014 Etsy. All rights reserved.
//

#import "EtsyStarsView.h"

CGFloat const static EtsyStarWidth = 18.0f;
CGFloat const static EtsyStarSpace = 4.0f;

@interface EtsyStarsView ()
@property (strong) NSArray *starViews;
@property (strong) UIImage *filledStar;
@property (strong) UIImage *emptyStar;
@end

@implementation EtsyStarsView

- (id)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        NSMutableArray *starViews = [[NSMutableArray alloc] init];
        self.emptyStar = [UIImage imageNamed:@"icon_star_empty.png"];
        self.filledStar = [UIImage imageNamed:@"icon_star_filled.png"];
        for (int idx = 0; idx < 5; idx++) {
            UIImageView *star = [[UIImageView alloc] init];
            [starViews addObject:star];
            [star setImage:self.emptyStar];
            star.frame = CGRectMake(idx * (EtsyStarWidth + EtsyStarSpace), 0.0, EtsyStarWidth, EtsyStarWidth);
            [self addSubview:star];
        }
        self.starViews = starViews;
    }
    return self;
}

- (void)setStars:(NSInteger)stars {
    _stars = stars;

    [self.starViews enumerateObjectsUsingBlock:^(UIImageView *star, NSUInteger idx, BOOL *stop) {
        star.image = (stars > idx) ? self.filledStar : self.emptyStar;
    }];
}

- (CGSize)sizeThatFits:(CGSize)size {
    return CGSizeMake(EtsyStarWidth * 5 + EtsyStarSpace * 3, EtsyStarWidth);
}

@end