UILabel *label = [[UILabel alloc] init];
label.font = [UIFont systemFontOfSize:15];
UIFont*font = label.font;
//转换HTML 字符串
NSDictionary *options = @{NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType,
NSFontAttributeName:font};
NSData *data = [htmlString dataUsingEncoding:NSUnicodeStringEncoding];
NSMutableAttributedString *attri = [[NSMutableAttributedString alloc] initWithData:data options:options documentAttributes:nil error:nil];
//设置行高
NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
style.lineSpacing=5;
[attri addAttribute:NSParagraphStyleAttributeName value:style range:NSMakeRange(0, attri.length)];
[labelsizeToFit];
label.attributedText= attri;
