Saving UIPickerView Data to Parse - ios

Question

I have a UIPickerView I need to save the users selection to Parse. I've tried a million different things and it just leaves my column blank. Any ideas what I am doing wrong? The information is just not saving to Parse, I know the UIPicker works though because the label updates. I have searched google and stack and can't see anything wrong with my code?
class ViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate {
#IBOutlet weak var pickerView: UIPickerView!
#IBOutlet weak var pickedLabel: UILabel!
var pickerDataSource = ["Car", "Bus", "Train", "Plane", "Boat"]
override func viewDidLoad() {
super.viewDidLoad()
self.pickerView.dataSource = self;
self.pickerView.delegate = self;
}
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return self.pickerDataSource.count;
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
return self.pickerDataSource[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int)
{
PFUser.currentUser()?["PickerColumn"] = self.pickerDataSource[row];
self.pickedLabel.text = "Your choice: \(self.pickerDataSource[row])"
PFUser.currentUser()?.saveInBackground()
}
I've also tried this:
var pickerSave: String?
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int)
{
pickerSave = pickerDataSource[row]
self.pickedLabel.text = "Your choice: \(self.pickerDataSource[row])"
}
#IBAction func next(sender: AnyObject) {
PFUser.currentUser()?["pickerColumn"] = pickerSave
self.performSegueWithIdentifier("next", sender:self)
PFUser.currentUser()?.saveInBackground()
}

Answer 1

If your label is updating then your picker is fine. You issue is the PFUser class. Is PFUser.currentUser() returning a dictionary as you expect? after you set "pickerColumn" can you print out its value on the console?
Does the following work:
PFUser.currentUser()?["pickerColumn"] = "1"
PFUser.currentUser()?.saveInBackground()
Those specific lines are what is breaking.

Answer 2

So It looks like you are trying to save the value from the picker into the parse _User class. I wouldn't recommend saving it there anyway. Im assuming you are using a mongoDB and this is a schema issue. So what I would do is make a new class for storing this data.
I would declare it like so.
var pickerData = PFObject(className:"PickerData")
#IBAction func next(sender: AnyObject) {
pickerData["user"] = PFUser.current()?
pickerData["data"] = self.pickedLabel.text
pickerData.saveInBackground()
}