只需要将UILabel替换成你项目中的Lable即可,大小按需求设置
NSMutableAttributedString * attributedString1 = [[NSMutableAttributedString alloc] initWithString:@"aaaa"];
NSMutableParagraphStyle * paragraphStyle1 = [[NSMutableParagraphStyle alloc] init];
[paragraphStyle1 setLineSpacing:15];
[attributedString1 addAttribute:NSParagraphStyleAttributeName value:paragraphStyle1 range:NSMakeRange(0, [@"aaaa" length])];
[[[UILabel alloc] init] setAttributedText:attributedString1];
[[[UILabel alloc] init] sizeToFit];