ios UILabel设置行间距

  _contentLabel 为uilabel       

  NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:_contentLabel.text];

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

  [paragraphString setLineSpacing:5];    //设置行间距

  [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphString range:NSMakeRange(0, _contentLabel.text.length)];

  _contentLabel.attributedText = attributedString;

    [_contentLabel sizeToFit];