解决设置了标签的最大行数，更新标签的内容为富文本内容，导致超过最大行数不显示...问题

-(void)setContentStr:(NSString *)contentStr
{
    if(isCommonUnitEmptyString(contentStr))
    {
        return;
    }
    _contentStr = contentStr;
    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]initWithString:contentStr];
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    [paragraphStyle setLineSpacing:8];
    [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [contentStr length])];
    self.contentLb.attributedText = attributedString;
    self.contentLb.lineBreakMode = NSLineBreakByTruncatingTail;
//    self.contentLb.text = getNotNilString(contentStr);
    [self unitsSdLayout];

}