iOS での高性能評価コントロールの実装

@interface XWStarMaker : NSObject @property (nonatomic, assign) CGFloat space; @property (nonatomic, strong) NSString *defaultImage; @property (nonatomic, strong) NSString *selectImage; @property (nonatomic,assign) NSInteger maxValue; @end

#import "YYLabel.h" #import "XWStarMaker.h" @class XWStarView; @protocol XWStarViewDelegate  @optional -(void)xw_starView:(XWStarView*)tagView star:(NSInteger)star; @end @interface XWStarView : YYLabel @property (nonatomic, assign) NSInteger score; @property (nonatomic,weak) id delegate; -(instancetype)initWithFrame:(CGRect)frame maker:(void (^)(XWStarMaker *))makeBlock; @end

@interface XWStarView () @property (nonatomic,strong) XWStarMaker *maker; @end @implementation XWStarView -(instancetype)initWithFrame:(CGRect)frame maker:(void (^)(XWStarMaker *))makeBlock{ if (self = [super initWithFrame:frame]) { self.maker = [[XWStarMaker alloc] init]; if (makeBlock) { makeBlock(self.maker); } self.displaysAsynchronously = YES; self.fadeOnAsynchronouslyDisplay = NO; [self creatScoreAttr]; } return self; } #pragma mark - private -(void)creatScoreAttr{ NSMutableAttributedString *text = [NSMutableAttributedString new]; UIFont *font = [UIFont systemFontOfSize:0]; for (int i = 0; i < self.maker.maxValue; i++) { UIImage *image = [UIImage imageNamed:self.maker.defaultImage]; NSMutableAttributedString *attachText = [NSMutableAttributedString yy_attachmentStringWithContent:image contentMode:UIViewContentModeLeft attachmentSize:CGSizeMake(image.size.width + self.maker.space, image.size.height) alignToFont:font alignment:YYTextVerticalAlignmentCenter]; //添加点击事件 weak typeof(&*self) weakSelf = self; [attachText yy_setTextHighlightRange:NSMakeRange(0, 1) color:nil backgroundColor:nil tapAction:^(UIView *containerView, NSAttributedString *text, NSRange range, CGRect rect){ if (weakSelf.delegate && [weakSelf.delegate respondsToSelector:@selector(xw_starView:star:)]) { [weakSelf.delegate xw_starView:weakSelf star:i]; } }]; [text appendAttributedString:attachText]; } self.attributedText = text; } -(void)setScore:(NSInteger)score{ if (_score == score) { return; } _score = score; //获取图片资源 NSArray *attachments = self.textLayout.attachments; for (int i = 0; i < attachments.count; i++) { YYTextAttachment *attachment = attachments[i]; attachment.content = [UIImage imageNamed:i <= _score ? self.maker.selectImage : self.maker.defaultImage]; } } @end

_scoreView = [[XWStarView alloc] initWithFrame:CGRectMake(0, self.frame.size.height - 40, self.frame.size.width, 40) maker:^(XWStarMaker *maker){ maker.defaultImage = @"goods_score_empt.png"; maker.selectImage = @"goods_score_full.png"; maker.space = 10; }]; _scoreView.delegate = self;