Get indexPath of UITextField in UITableViewCell with Swift

Question

So, I'm building a Detail View Controller App that presents a Table with a two-part cell: the label and the Text Field.

I'm trying to retrieve the Text Field value and add it to an array. I tried to use the "textField.superview.superview" technique but it didn't worked.

func textFieldDidEndEditing(textField: UITextField!){
    var cell: UITableViewCell = textField.superview.superview
    var table: UITableView = cell.superview.superview
    let textFieldIndexPath = table.indexPathForCell(cell)
}

Xcode fails to build and presents that "UIView is not convertible to UITableViewCell" and "to UITableView". The referring table has two sections, of four and two rows, respectively.

Thanks in advance.

EDIT: added ".superview" at the second line of the function.

have you tried casting? try adding "as UITableViewCell" at the end of the .superview.superview line — Connor Pearson, Jun 06 '14 at 01:57
iOS 7 changed the UITableViewCell hierachy, something.superview.superview no longer works. You need to use the [sender convertPoint:CGRectZero toView:self.tableView] to get root point, then go NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:rootPoint]; Of course, you need to do this using Swift code, which I don't know (just showing the algorithm here that's all). — Zhang, Jun 06 '14 at 02:08
Duplicate of http://stackoverflow.com/questions/9577392/uitextfield-subview-of-uitableviewcell-get-indexpath-of-cell/27938042#27938042 — Daniel Galasko, Jul 28 '15 at 15:52

score 29 · Answer 1 · edited Aug 31 '20 at 17:43

While the currently accepted answer might work, it assumes a specific view hierarchy, which is not a reliable approach since it is prone to change.

To get the indexPath from a UITextField that is inside a cell, it's much better to go with the following:

func textFieldDidEndEditing(textField: UITextField!){
    let pointInTable = textField.convert(textField.bounds.origin, to: self.tableView)
    let textFieldIndexPath = self.tableView.indexPathForRow(at: pointInTable)
    ...
}

This will continue to work independent of eventual changes to the view hierarchy.

score 11 · Accepted Answer · edited Apr 21 '18 at 11:51

11

You'll want to cast the first and second lines in your function, like this:

func textFieldDidEndEditing(textField: UITextField!){
    var cell: UITableViewCell = textField.superview.superview as UITableViewCell
    var table: UITableView = cell.superview as UITableView
    let textFieldIndexPath = table.indexPathForCell(cell)
}

superview returns a UIView, so you need to cast it to the type of view you expect.

edited Apr 21 '18 at 11:51

pacification

5,838
4
29
51

answered Jun 06 '14 at 02:01

Connor Pearson

63,902
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Now it builds correctly but when the simulator runs the "cell as UITableView" the app crashes. Might you guess whats wrong? – Nuno Casteleira Jun 06 '14 at 02:45
It's probably because the cell's superview isn't a UITableView. You'll have to access the tableview differently – Connor Pearson Jun 06 '14 at 02:48
suggestions? im really new to this world ;) – Nuno Casteleira Jun 06 '14 at 02:53
http://stackoverflow.com/questions/1110482/reference-from-uitableviewcell-to-parent-uitableview may help – Connor Pearson Jun 06 '14 at 02:59
Useful. Exactly what I was looking for. – Sami Nov 16 '16 at 02:23

laxman khanal · Answer 3 · 2017-09-13T14:47:31.410

Using superview and typecasting isn't a preferred aaproach. The best practice is to use delegate pattern. If you have a textField in DemoTableViewCell which you are using in DemoTableViewController make a protocol DemoTableViewCellDelegate and assign delegate of DemoTableViewCell to DemoTableViewController so that viewcontroller is notified when eiditing ends in textfield.

protocol DemoTableViewCellDelegate: class {
  func didEndEditing(onCell cell: DemoTableViewCell)
}

class DemoTableViewCell: UITableViewCell {
  @IBOutlet var textField: UITextField!

  weak var delegate: DemoTableViewCellDelegate?

  override func awakeFromNib() {
    super.awakeFromNib()
    textField.delegate = self
  }
}

extension DemoTableViewCell: UITextFieldDelegate {
  func textFieldDidEndEditing(_ textField: UITextField) {
    delegate.didEndEditing(onCell: self)
  }
}

class DemoTableViewController: UITableViewController {

  override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 
    let cell = tableView.dequeueReusableCell(withIdentifier: String(describing: DemoTableViewCell.self, for: indexPath)
    cell.delegate = self
    return cell
  }

}

extension DemoTableViewController: DemoTableViewCellDelegate {
  func didEndEditing(onCell cell: DemoTableViewCell) {
    //Indexpath for the cell in which editing have ended.
    //Now do whatever you want to do with the text and indexpath.
    let indexPath = tableView.indexPath(for: cell)
    let text = cell.textField.text
  }
}

score -2 · Answer 4 · answered Aug 07 '18 at 08:15

-2

You can use tag property of UITableViewCell

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        let cell = tableView.dequeueReusableCell(withIdentifier: "UpdateTableViewCell", for: indexPath) as! UpdateTableViewCell

        cell.tag = indexPath.row
        cell.setCellData()

        return cell
}

now in UITableViewCell

func textFieldDidEndEditing(textField: UITextField!){
    let textFieldIndexPath = self.tag
}

answered Aug 07 '18 at 08:15

Pranay Pawar

1
1

it will always give 0 tag, It is applied if you have one `textField` in the whole table view and that will be without using the tag. Tags are only useful in button action. – Anurag Sharma Sep 03 '20 at 18:19

Get indexPath of UITextField in UITableViewCell with Swift

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