设置lable文本内容的行间距

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

paragraphStyle.lineSpacing = 50;

NSDictionary *attributes = @{ NSFontAttributeName:[UIFont

systemFontOfSize:14],NSParagraphStyleAttributeName:paragraphStyle };

LABLE.attributedText =[ [ NSAttributedString alloc] initWithString :lable.text attributes:attributes];

LABLE就是你创建的lable'