如何根据UITextView子视图的大小调整UITableViewCell的大小？

Question

Currently I can successfully resize my UITextView according to the amount of text within it.

My problem is that this UITextView is within a UITableViewCell. What I've tried to do is use the height of the resized UITextView to resize the cell by accessing it's frame and setting the height of that.

This is my code:

          //dynamically resize textview and cell based on content
                self.aboutMeTextView.text = profile["aboutMe"] as String
                self.aboutMeTextView.sizeToFit()
                self.aboutMeTextView.layoutIfNeeded()
                var frame = self.aboutMeTextView.frame as CGRect
                frame.size.height = self.aboutMeTextView.contentSize.height
                self.aboutMeTextView.frame = frame

                var cellFrame = self.aboutMeCell.frame as CGRect
                cellFrame.size.height = self.aboutMeTextView.contentSize.height * 2

                self.aboutMeCell.frame = cellFrame

It just doesn't work properly. The textView resizes but the cell doesn't resize properly and also my scrollView won't even scroll down enough for me to see the whole of the resized textview. I'm guessing if I can successfully set the cells height, the scrollView height will automatically adjust.

I've looked at similar questions but they haven't helped me.

Would appreciate some help.

Thanks for your time

Answer 1

You can use the UITableView -method heightForRowAtIndexPath

API Documentation

It returns the height for a row. So you can use the label from the current cell and set the height of the cell to the height of the label:

override func tableView(tableView: UITableView!, heightForRowAtIndexPath indexPath: NSIndexPath!) -> CGFloat {
    var cellID = "Cell"
    var cell:UITableViewCell = tableView.dequeueReusableCellWithIdentifier(cellID)  as UITableViewCell

    var yourLabelHeight = cell.yourLabel.size.height
    return yourLabelHeight
}

Answer 2

You can call UITableView.beginUpdates() and UITableView.endUpdates() like so:

    extension TableViewCell: UITextViewDelegate {

        var delegate: TableViewController!
        var row: Int!

        func textViewDidChange(_ textView: UITextView) {

            delegate.tableView.beginUpdates()
            delegate.tableView.endUpdates()

        }

    }


    class TableViewController: UITableViewController {

        override func viewDidLoad() {
            super.viewDidLoad()

            tableView.rowHeight = 44
            tableView.rowHeight = UITableViewAutomaticDimension
            tableView.estimatedRowHeight = 44

        }

        override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
            let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell

            cell.delegate = self
            cell.row = indexPath.row

            return cell

        }

    }

Be sure your constraints are set up for your text view in the table view cell.