// 先初始化一个段落样式
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
// 调整行间距
[paragraphStyle setLineSpacing:3];
self.descLabel.attributedText =[[NSAttributedString alloc] initWithString: _model.desc
attributes:@{NSFontAttributeName:
[UIFont systemFontOfSize:11.f],
NSForegroundColorAttributeName:[UIColor redColor], NSParagraphStyleAttributeName:paragraphStyle}];
