NSString *oldPrice = @"¥ 12345";
NSUInteger length = [oldPrice length];
NSMutableAttributedString *attri = [[NSMutableAttributedString alloc] initWithString:oldPrice];
[attri addAttribute:NSStrikethroughStyleAttributeName value:@(NSUnderlinePatternSolid | NSUnderlineStyleSingle) range:NSMakeRange(2, length-2)];
[attri addAttribute:NSStrikethroughColorAttributeName value:UIColorFromRGB(0x999999, 1) range:NSMakeRange(2, length-2)];
[oldPriceLabel setAttributedText:attri];