How to give ContainerView dynamic height?

[ramotion]

How to give ContainerView dynamic height?

[mohpor]

It's pretty straightforward:

• You should be able to calculate the height (for opened state) for each cell individually.
• then

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    var duration = 0.0
    if cellHeights[indexPath.row] == kCloseCellHeight { // open cell
      cellHeights[indexPath.row] = openHeightForRow(at: indexPath) /*kOpenCellHeight*/ // This value must be more than twice the size of kCloseCellHeight otherwise asserts will break loose!
      cell.selectedAnimation(true, animated: true, completion: nil)
      duration = 0.5
    } else {// close cell
      cellHeights[indexPath.row] = kCloseCellHeight
      cell.selectedAnimation(false, animated: true, completion: nil)
      duration = 1.1
    }

    UIView.animateWithDuration(duration, delay: 0, options: .CurveEaseOut, animations: { () -> Void in
      tableView.beginUpdates()
      tableView.endUpdates()
      }, completion: nil)
  }

• Don't forget to update your containerView's height (preferably in cellForRowAtIndexPath...) and if you want, you can even customize how many times your cell folds!:

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    guard let cell = tableView.dequeueReusableCellWithIdentifier(cellID, forIndexPath: indexPath) as? FoldingCell else {
      return UITableViewCell()
    }

    let height = messageHeightForCell(at: indexPath)
    cell.containerHeightConstraint.constant = height
    cell.itemCount = Int(round(height / 100.0)) // Decides number of folds for cell
    return cell
  }

• in case you have variable itemCounts (a.k.a. folds), in your cell:

override func animationDuration(itemIndex: NSInteger, type: AnimationType) -> NSTimeInterval {
    var durations = [0.26]
    for _ in 1...itemCount {
      durations.append(0.2)
    }
    return durations[itemIndex]
  }

well, I guess that's it!

[volkermatthes]

I would be intrerested in a solution for this aswell 👍

[FlyingAppleFish]

nice