lineSpacing not working

here is my code:
OHParagraphStyle\* paragraphStyle = [OHParagraphStyle defaultParagraphStyle];
paragraphStyle.lineSpacing = 0;
paragraphStyle.textAlignment=kCTJustifiedTextAlignment;
[attributedString setParagraphStyle:paragraphStyle range:NSMakeRange(0, attributedString.length)];
cell.bodyOHAttributedLabel.attributedText = attributedString;