UIAlert w/ text field to table - ios

Question

My objective is to create a new row in the table in the master view titled with the input from the UIAlert stored in namePrompt. How would I achieve this?
Currently, when I try to make a new row (using the + button in the top-right hand corner of the iPad simulator, running iOS 8) it crashes the app. I'm not really sure what I have done wrong, and any help at all is appreciated.
Code:
func insertNewObject(sender: AnyObject) {
//prompt for kid name
var namePrompt = UIAlertController(title: "Add Child", message: "Please enter child name", preferredStyle: UIAlertControllerStyle.Alert)
namePrompt.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: nil))
namePrompt.addAction(UIAlertAction(title: "Add Child", style: UIAlertActionStyle.Default, handler: nil))
namePrompt.addTextFieldWithConfigurationHandler({(textField: UITextField!) in
textField.placeholder = "Johnny"
})
self.presentViewController(namePrompt, animated: true, completion: nil)
let childName: AnyObject = namePrompt.textFields![0]
//add new object w/ above name
objects.insertObject(childName, atIndex: 0)
let indexPath = NSIndexPath(forRow: 0, inSection: 0)
self.tableView.insertRowsAtIndexPaths([indexPath], withRowAnimation: .Automatic)
}
I think that the problem is arising from the let childName: Any Object line, and/or the objects.insertObject line.
--EDIT--
When I build/run the project, no errors are given to me in the code, but when I try to add a new row, as soon as I press the + button, I get 0x1fbaff4: nopw %cs:(%eax,%eax) from Thread 1 . This is related to the line let object = objects[indexPath.row] as NSDate (in below snippet) line (the default for the objects.insertObject line above was an NSDAte). I changed the NSDate to NSString and the same thing happened.
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as UITableViewCell
let object = objects[indexPath.row] as NSString
cell.textLabel?.text = object.description
return cell
}

Answer 1

You seem to be assuming that the textFields of the UIAlertController will be filled in immediately after the alert is presented. That doesn't give the user any time to actually fill out the fields.
Put the let childName = namePrompt.textFields![0] line (and following) in one of your button actions instead and wait for the user to tap that button before reading the textField.
--EDIT--
Here is your code with my suggested modification. I made as few changes to your code as possible. Note that there is an if statement to guard against empty childNames, but it won't guard against someone entering a bunch of spaces. You should probably make that part more robust.
func insertNewObject(sender: AnyObject) {
//prompt for kid name
var namePrompt = UIAlertController(title: "Add Child", message: "Please enter child name", preferredStyle: UIAlertControllerStyle.Alert)
namePrompt.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: nil))
namePrompt.addAction(UIAlertAction(title: "Add Child", style: UIAlertActionStyle.Default, handler: { (alertAction) in
let childName = (namePrompt.textFields![0] as UITextField).text as String
if childName != "" {
self.objects.insert(childName, atIndex: 0)
let indexPath = NSIndexPath(forRow: 0, inSection: 0)
self.tableView.insertRowsAtIndexPaths([indexPath], withRowAnimation: .Automatic)
}
}))
namePrompt.addTextFieldWithConfigurationHandler({(textField: UITextField!) in
textField.placeholder = "Johnny"
})
self.presentViewController(namePrompt, animated: true, completion: nil)
}