调整UILabel的行间距

NSString *cLabelString =@"       这是测试UILabel行间距的text。这是测试UILabel行间距的text。\n       这是测试UILabel行间距的text。\n      这是测试UILabel行间距的text。这是测试UILabel行间距的text。这是测试UILabel行间距的text。这是测试UILabel行间距的text。";

UILabel *cLabel = [[UILabelalloc]initWithFrame:CGRectMake(20, 20, 280, 200)];

cLabel.numberOfLines = 0;

cLabel.textColor = [UIColorgrayColor];

NSMutableAttributedString *attributedString1 = [[NSMutableAttributedStringalloc] initWithString:cLabelString];

NSMutableParagraphStyle *paragraphStyle1 = [[NSMutableParagraphStylealloc] init];

[paragraphStyle1 setLineSpacing:8];

[attributedString1 addAttribute:NSParagraphStyleAttributeNamevalue:paragraphStyle1 range:NSMakeRange(0, [cLabelStringlength])];

[cLabel setAttributedText:attributedString1];

[cLabel sizeToFit];