Get indexPath in UITableViewCell subclass - swift

Question

I have a subclass of UITableViewCell that is shown in a TableView. Each cell has a text field. When the textFieldDidEndEditing func is called, I want to save the entered text as an attribute of an NSManagedObject in my Managed Object Context.
This function is implemented in my tableViewCell class:
func textFieldDidEndEditing(textField: UITextField) {
let viewController = ViewController()
let indexPath: NSIndexPath!
viewController.updateCommitsInMOC(self, atIndexPath: indexPath!)
}
And this is the function it calls. This function is implemented in my ViewController class, the one that controls the TableView which is made up of the tableViewCells:
func updateCommitsInMOC(cell: CommitTableViewCell, atIndexPath indexPath: NSIndexPath) {
// Fetch Commit
let commit = fetchedResultsController.objectAtIndexPath(indexPath) as! Commit
// Update Cell
commit.contents = cell.commitContents.text!
if cell.repeatStatus.selectedSegmentIndex == 1 { commit.repeatStatus = true }
saveManagedObjectContext()
}
I'm of course open to any suggestions as to other ways to implement the saving behavior every time the user is done editing the text field.

Answer 1

Is your question "How do I get the IndexPath"? Instead of the UITableviewCell trying to figure out what it's indexPath is in textFieldDidEndEditing, why don't you just figure it out within updateCommitsInMOC function?
Assuming you have a reference to your tableView you can just do this
func updateCommitsInMOC(cell: CommitTableViewCell) {
guard let indexPath = tableView.indexPathForCell(cell) else {
return
}
// Fetch Commit
let commit = fetchedResultsController.objectAtIndexPath(indexPath) as! Commit
// Update Cell
commit.contents = cell.commitContents.text!
if cell.repeatStatus.selectedSegmentIndex == 1 { commit.repeatStatus = true }
saveManagedObjectContext()
}

Answer 2

You can add a tag as row in cell textField.
like this:
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("idCell")
cell.textField.tag = indexPath.row
return cell
}
and the textField delegate:
func textFieldDidEndEditing(textField: UITextField) {
let viewController = ViewController()
let indexPath = NSIndexPath(forRow: textField.tag, section: 0)
viewController.updateCommitsInMOC(self, atIndexPath: indexPath!)
}
or you can use the superview:
func textFieldDidEndEditing(textField: UITextField) {
let view = textField.superview!
let cell = view.superview as! UITableViewCell
let viewController = ViewController()
let indexPath = itemTable.indexPathForCell(cell)
viewController.updateCommitsInMOC(self, atIndexPath: indexPath!)
}

Answer 3

I suggest you to use in your tableview the
setEditing(editing, animated: animated) method.
Then inside of it you can manage the single object retrieving it from the fetchResultController.indexPathForObject(inputObject) or as you used fetchedResultsController.objectAtIndexPath(indexPath).
Finally you can use self.managedObjectContext.saveToPersistentStore() or self.managedObjectContext.save().