UILabel 设置行间距

UILabel *label1 = [[UILabel alloc]initWithFrame:frame];

label1.numberOfLines = 0;

[self.view addSubview:label1];

NSString *testString = @"欢迎您加入*******************";

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

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

[paragraphStyle1 setLineSpacing:15];

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

[label1 setAttributedText:attributedString1];