How do you edit or delete text in a tableView? - xcode

Question

I am trying have the user to modify/delete default text in a tableview, I have tried the following code witch works but as soon as the user goes to the other view controller and back (or leaves the app and comes back), the text goes back to being the default text.
How could I have it work?
I have posted the entire code for the tableView so you can have an overview of what I could have done wrong.
thank you !
var places = [Dictionary<String,String>()]
var activePlace = -1
class TableViewController: UITableViewController {
func companyNameUpdatedAlert(title: String, error: String, indexPath: Int) {
let alert = UIAlertController(title: title, message: error, preferredStyle: UIAlertControllerStyle.Alert)
alert.addTextFieldWithConfigurationHandler { (textField) -> Void in
textField.placeholder = "Enter new text"
}
alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: { (action) -> Void in
let lat = places[indexPath]["lat"]!
let lon = places[indexPath]["lon"]!
places.removeAtIndex(indexPath)
places.insert(["name" : alert.textFields![0].text!, "lat" : lat, "lon" : lon], atIndex: indexPath)
self.tableView.reloadData()
}))
self.presentViewController(alert, animated: true, completion: nil)
}
override func tableView(tableView: UITableView, editActionsForRowAtIndexPath indexPath: NSIndexPath) -> [UITableViewRowAction]? {
let changeText = UITableViewRowAction(style: UITableViewRowActionStyle.Default, title: "Change text" , handler: { (action:UITableViewRowAction, indexPath:NSIndexPath) -> Void in
self.companyNameUpdatedAlert("Update text", error: "enter text below", indexPath: indexPath.row)
})
let deleteAction = UITableViewRowAction(style: UITableViewRowActionStyle.Default, title: "Delete" , handler: { (action:UITableViewRowAction, indexPath:NSIndexPath) -> Void in
places.removeAtIndex(indexPath.row)
tableView.reloadData()
})
return [changeText, deleteAction]
}
override func viewDidLoad() {
//save start
if NSUserDefaults.standardUserDefaults().objectForKey("places") != nil {
places = NSUserDefaults.standardUserDefaults().objectForKey("places") as! [Dictionary]
//save stop
super.viewDidLoad()
if places.count == 1 {
places.removeAtIndex(0)
places.append(["name":"Long press on map to add location","lat":"90","lon":"90"])
}
if NSUserDefaults.standardUserDefaults().objectForKey("places") != nil {
places = NSUserDefaults.standardUserDefaults().objectForKey("places") as! [Dictionary]
}
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return places.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as UITableViewCell
cell.textLabel?.text = places[indexPath.row]["name"]
return cell
}
override func tableView(tableView: UITableView, willSelectRowAtIndexPath indexPath: NSIndexPath) -> NSIndexPath? {
activePlace = indexPath.row
return indexPath
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "newPlace" {
activePlace = -1
}
}
override func viewWillAppear(animated: Bool) {
tableView.reloadData()
}
}

Answer 1

When you edit the table you should persist your data in the NSUserDefaults. Otherwise you are just changing the class property which is reloaded from the original NSUserDefaults each time the class loads.
Try this inside your UIAlertAction closure:
NSUserDefaults.standardUserDefaults().setObject(places, forKey: "places")
NSUserDefaults.standardUserDefaults().synchronize()