给label加中划线

  self.newpriceLabel.text = @"￥100";

   NSString *oldStr = @"￥120";

    //中划线

    NSDictionary *attribtDic =@{NSStrikethroughStyleAttributeName: [NSNumbernumberWithInteger:NSUnderlineStyleSingle]};

    //下划线

    //        NSDictionary *attribtDic = @{NSUnderlineStyleAttributeName: [NSNumber numberWithInteger:NSUnderlineStyleSingle]};

    NSMutableAttributedString *attribtStr = [[NSMutableAttributedStringalloc]initWithString:oldStrattributes:attribtDic];

   self.oldPriceLabel.attributedText = attribtStr;