商品折扣价 下划线不显示问题

最近搞商城这边，本来之前好好的但是在不同机型下面有的 商品元件的下划线竟然没有了～～
找了好多资料，最后添加了[attribute addAttribute:NSBaselineOffsetAttributeName value:@(0) range:NSMakeRange(0, length)];总算解决了

NSString *price = [NSString stringWithFormat:@"￥%.2f
[self.model.MarketPrice floatValue]];
NSUInteger length = [price length];
NSMutableAttributedString *attribute = [[NSMutableAttributedString alloc] initWithString:price];
[attribute addAttribute:NSBaselineOffsetAttributeName value:@(0) range:NSMakeRange(0, length)];
[attribute addAttribute:NSStrikethroughStyleAttributeName value:@(NSUnderlinePatternSolid | NSUnderlineStyleSingle) range:NSMakeRange(0, length)];
self.delectPrice.attributedText = attribute;