UILabel *reasonLabel = [[UILabel alloc] initWithFrame:CGRectMake(15, 15, UIScreenWidth - 30, textHeight)];
reasonLabel.textColor = [UIColor colorWithHexString:@"#999999"];
reasonLabel.numberOfLines = 0;
reasonLabel.font = [UIFont systemFontOfSize:14];
reasonLabel.adjustsFontSizeToFitWidth = YES;
//核心代码
NSMutableAttributedString * attributedString1 = [[NSMutableAttributedString alloc] initWithString:tempString];
NSMutableParagraphStyle * paragraphStyle1 = [[NSMutableParagraphStyle alloc] init];
//间距为5
[paragraphStyle1 setLineSpacing:5];
[attributedString1 addAttribute:NSParagraphStyleAttributeName value:paragraphStyle1 range:NSMakeRange(0, [tempString length])];
[reasonLabel setAttributedText:attributedString1];
[reasonLabel sizeToFit];
[self.view addSubview:reasonLabel];
