//顯示下劃線
中劃線
NSDictionary *attribtDic = @{NSStrikethroughStyleAttributeName: [NSNumber numberWithInteger:NSUnderlineStyleSingle]};
下劃線
NSDictionary *attribtDic = @{NSUnderlineStyleAttributeName: [NSNumbernumberWithInteger:NSUnderlineStyleSingle]};
NSMutableAttributedString *attribtStr = [[NSMutableAttributedString alloc]initWithString:oldStrattributes:attribtDic];
oldPriceLabel.attributedText = attribtStr;
