通过文字计算lab高度

 

 

  var attrButes:[NSAttributedString.Key : Any]! = nil;
        let paraph = NSMutableParagraphStyle()
        paraph.lineSpacing = 8
        attrButes = [NSAttributedString.Key.font:UIFont.systemFont(ofSize: 13.5),NSAttributedString.Key.paragraphStyle:paraph]
        
        let size:CGRect = model.content!.boundingRect(with: CGSize(width: HL_APP_WIDTH - 30 , height: CGFloat.greatestFiniteMagnitude), options: NSStringDrawingOptions.usesLineFragmentOrigin, attributes: attrButes, context: nil)
        
//        detailHeaderView.contTextLab.text = ""
        detailHeaderView.contTextLab.attributedText = NSAttributedString(string: model.content!, attributes: attrButes)
        detailHeaderView.contTextLab.numberOfLines = 0
        detailHeaderView.contTextLab.sizeToFit()
        context_H = size.height