iOS UILabel自定义行间距

        NSString *hintStr = @"输入材料标题搜索材料\n注:可根据材料序号直接搜索, 如TPO23";

        CGSize size = [toolset returnTextStringSizeWithString:hintStr withBoundSize:CGSizeMake(Main_Screen_Width - 72, MAXFLOAT) withFont:FZHei(15)];

        self.mHintLabelLayoutH.constant = size.height + 20;

        [self.mHitLabel setNeedsLayout];

        NSMutableAttributedString *prefixAttr = [[NSMutableAttributedString alloc] initWithString:hintStr];

        [prefixAttr addAttribute:NSFontAttributeName value:FZHei(17) range:NSMakeRange(0, hintStr.length)];

        [prefixAttr addAttribute:NSForegroundColorAttributeName value:ColorHui range:NSMakeRange(0, hintStr.length)];

        [prefixAttr addAttribute:NSForegroundColorAttributeName value:HexRGB(0xc0c0c0) range:NSMakeRange(11, 21)];

        [prefixAttr addAttribute:NSFontAttributeName value:FZHei(13) range:NSMakeRange(11, 21)];

        NSMutableParagraphStyle *paragraphString = [[NSMutableParagraphStyle alloc] init];

        [paragraphString setLineSpacing:8];    //设置行间距

        [prefixAttr addAttribute:NSParagraphStyleAttributeName value:paragraphString range:NSMakeRange(0, hintStr.length)];

        self.mHitLabel.attributedText = prefixAttr;

iOS UILabel自定义行间距

原文：http://www.cnblogs.com/Milo-CTO/p/4742351.html