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[grand-china]

cache the height to model, may is anythings you want

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: cellIdForMessage(msg:array[safe: indexPath.row]), for: indexPath)
        
        if let model = array[safe: indexPath.row] {
            cell.reloadData(data: model as Any)
            if (model.cellHeigth > CGFloat(0)) == false {
                let size = cell.contentView.systemLayoutSizeFitting(CGSize(width: YYScreenSize().width, height: 0), withHorizontalFittingPriority: .required, verticalFittingPriority: .fittingSizeLevel)
                model.cellHeigth = size.height
            }
        }

        return cell;
    }

[cddjr]

无论MVC还是MVVM-C，M都不应和V耦合