Swift UILabel显示添加中间划线

商品打折显示原价和折后价，原价需要有中划线效果：



先看OC版：

UILabel *label = [[UILabel alloc]init];

    

    NSString *string = @"¥5981";

    NSDictionary *attribDic = @{NSStrikethroughStyleAttributeName:[NSNumber numberWithInteger:NSUnderlineStyleSingle]};

    

    NSMutableAttributedString *attribtStr = [[NSMutableAttributedString alloc]initWithString:string attributes:attribDic];

    label.attributedText = attribtStr; 

Swift 版：

let priceString = NSMutableAttributedString.init(string: "¥58921")

   priceString.addAttribute(NSStrikethroughStyleAttributeName, value: NSNumber.init(value: 1), range: NSRange(location: 0, length: priceString.length))

            

            singleOrderMoney.attributedText = priceString