iOS 改变同一个label中多行文字间的距离

    UILabel *titleLabel = [[UILabel alloc] init];

    titleLabel.text = @"很抱歉，没有找到相关文件\n您可以申请添加";

    titleLabel.numberOfLines = 2;

    titleLabel.font = [UIFont systemFontOfSize:13.0];

    titleLabel.textColor = [UIColor colorWithHexString:@"#999999"];

 

　　//上下间距

    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]initWithString:titleLabel.text];;

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

    [paragraphStyle setLineSpacing:8];

    [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, titleLabel.text.length)];

    titleLabel.attributedText = attributedString;

    

    titleLabel.textAlignment = NSTextAlignmentCenter;

    [view addSubview:titleLabel];

    

    [titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.equalTo(imgV.mas_bottom).offset(12);

        make.left.equalTo(view.mas_left);

        make.right.equalTo(view.mas_right);

    }];