Controlling Line Spacing using AttributedString

NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
style.lineSpacing = 17;
textView.attributedText = [[NSAttributedString alloc] 
    initWithString:@"Predefined Text" 
    attributes:@{NSParagraphStyleAttributeName : style}];
textView.text = @"Your text"