OC 创建枚举,创建单例,文本中划线(富文本)

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//NS_ENUM，定义状态等普通枚举typedef NS_ENUM(NSUInteger, TTGState) {TTGStateOK = 0,TTGStateError,TTGStateUnknow};//NS_OPTIONS，定义选项typedef NS_OPTIONS(NSUInteger, TTGDirection) {TTGDirectionNone = 0,TTGDirectionTop = 1 << 0,TTGDirectionLeft = 1 << 1,TTGDirectionRight = 1 << 2,TTGDirectionBottom = 1 << 3};

//创建单例+(id)shareInstance{     static dispatch_once_t onceToken;      dispatch_once(&onceToken, ^{      if(_instance == nil)             _instance = [MyClass alloc] init];     });     return _instance;}

NSMutableAttributedString *attrStr = [[NSMutableAttributedString alloc] initWithString:[NSString stringWithFormat:@"¥%@", goodsModel.originPrice]];    [attrStr addAttribute:NSStrikethroughStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:NSMakeRange(0, attrStr.length)];    self.originalPriceLB.attributedText = attrStr;

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