Swift: How to reload row height in UITableViewCell without reloading data

Question

I have a case in which I have to reload only height of a UITableViewCell.

but if I call the function

tableView.reloadRowsAtIndexPaths([         


        

Answer 1

About your question for example, to give a specific height dimension :

override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
  if indexPath.row == 3 {
    return 50.0
  }

  return 72.0
}

But I think you have a webView inside a cell so, generally, to calculate the dynamic height of a UITableViewCell with a UIWebView: (this example have two webViews)

class MyTableViewController: UITableViewController, UIWebViewDelegate
{
    var content : [String] = ["
My First Heading
My first paragraph
", "In Chinese, Coca-Cola means Bite the Wax Tadpole"]
    var contentHeights : [CGFloat] = [0.0, 0.0]

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
    {
        let cell = tableView.dequeueReusableCellWithIdentifier("myCustomCell", forIndexPath: indexPath) as! MyCustomCell
        let htmlString = content[indexPath.row]
        let htmlHeight = contentHeights[indexPath.row]

        cell.webView.tag = indexPath.row
        cell.webView.delegate = self
        cell.webView.loadHTMLString(htmlString, baseURL: nil)
        cell.webView.frame = CGRectMake(0, 0, cell.frame.size.width, htmlHeight)
        return cell
    }
    override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat
    {
        return contentHeights[indexPath.row]
    }
    func webViewDidFinishLoad(webView: UIWebView)
    {
        if (contentHeights[webView.tag] != 0.0)
        {
            // height knowed, no need to reload cell
            return
        }
        contentHeights[webView.tag] = webView.scrollView.contentSize.height
        tableView.reloadRowsAtIndexPaths([NSIndexPath(forRow: webView.tag, inSection: 0)], withRowAnimation: .Automatic)
    }
}