文字中间划线

NSMutableAttributedString *content = [[NSMutableAttributedString alloc] initWithString:_marketPriceLab.text];NSRange contentRange = {0, [content length]};[content addAttribute:NSStrikethroughStyleAttributeName value:@(NSUnderlinePatternSolid | NSUnderlineStyleSingle) range:contentRange];_marketPriceLab.attributedText = content;