UILabel setLineSpacing

iOS 6 or higher gives us the opertunity to style a UILabel with a custom line spacing. Is there someone who can help me to create/implement this in the TiUILabel.m class?

We can take this as a start:

NSMutableParagraphStyle *paragrahStyle = [[NSMutableParagraphStyle alloc] init];
 [paragrahStyle setLineSpacing:40];
 [attributedString addAttribute:NSParagraphStyleAttributeName value:paragrahStyle range:NSMakeRange(0, [labelText length])];
 
 cell.label.attributedText = attributedString ;