标签按照内容长度修改高度：

 CGRect newFrame = self.labelDescription.frame;

    

    [self.labelDescription sizeToFit];

    

    newFrame.size = CGSizeMake(maxDescriptionWidth, self.labelDescription.frame.size.height);

    

    self.labelDescription.frame = newFrame;

    

    if (self.labelDescription.frame.size.height > maxDescriptionHeight) {