CGFloat heih = 20;

 

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 = [[UILabel alloc]initWithFrame:CGRectMake(20, heih, 280, 200)];

cLabel.numberOfLines = 0;

cLabel.font = [UIFont fontWithName:fontName size:16];

cLabel.textColor = [UIColor grayColor];

 

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

NSMutableParagraphStyle * paragraphStyle1 = [[NSMutableParagraphStyle alloc] init];

[paragraphStyle1 setLineSpacing:8];

[attributedString1 addAttribute:NSParagraphStyleAttributeName value:paragraphStyle1 range:NSMakeRange(0, [cLabelString length])];

[cLabel setAttributedText:attributedString1];

[cLabel sizeToFit];

[self.view addSubview:cLabel];