Retrieving data from Parse using Swift 2.0

Question

I need a bit help, I've made a pickerview and i want to retrieve it's data from Parse.

I need to assign values to array and show it on Picker View.

Help me guys. Thanks.

override func viewDidLoad() {
super.viewDidLoad()


        let pickerView = UIPickerView()
        pickerView.delegate = self
        doctor.inputView = pickerView

        let query = PFQuery(className: "doctors")
        //wherekey can be omited
        query.whereKey("doctorId", equalTo:"1")

        query.findObjectsInBackgroundWithBlock({ (objects, error) -> Void in

            if let objects = objects {

                for object in objects {

                    self.doctorNames.append(object["doctorNames"] as! String)

                    pickerView.reloadAllComponents()

                }

            }


        })
}

And Here my pickerView Functions:

  func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
        return 1
    }

    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return doctorNames.count
    }

    func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return doctorNames[row]
    }

    func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        doctor.text = doctorNames[row]  //bad inscturctions error on this line
    }

I'm not familiar with doctor, So not sure about that part. Have to tried to print the objects returned from parse? what is the actual issue that your having? are the values not being returned? or they are returned but not showing in the picker view? — Scriptable
– Scriptable, Commented Oct 10, 2015 at 12:36
doctors is parse table name, doctor is the name of textfield that takes the value of viewPicker. My main problem is values not being returned. I need to take these values. — Berk Kaya
– Berk Kaya, Commented Oct 10, 2015 at 12:41
You need to provide some additional info to get help with this issue, can you provide the values passed to objects and error? is there any suggestion of what array is out of bounds? how is the array defined? — Scriptable
– Scriptable, Commented Oct 10, 2015 at 13:14

Scriptable · Accepted Answer · 2015-10-10 14:16:31Z

1

NOTE: I cannot post well formatted code in the comments, so I'll put this here for now. If I manage to solve the issue then I'll leave it here with edits, if not I'll delete it shortly.

It's possible that the query is not returning anything or doctorNames is not a valid property on the returned object. try this code and let us know the result

if let objects = objects {
    print("objects returned: \(objects)")
    for object in objects {
        print("adding object to pickerView: \(object)")
        self.doctorNames.append(object["doctorNames"] as! String)
    }
    // also I'd put this outside of the loop
    pickerView.reloadAllComponents()
} else {
    print("something went wrong here. Objects is: \(objects), error is: \(error)")
}

EDIT:

After the op posting log results, the error was in the filter. adding query.whereKey("doctorId", equalTo:"1") did not return any results. Omitting this line will return all results though.

edited Oct 10, 2015 at 14:16

answered Oct 10, 2015 at 14:03

Scriptable

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3 Comments

Berk Kaya Over a year ago

How do I sort these values alphabetically before printing to screen? Is there any way?

Scriptable Over a year ago

you should be able to add a sort property on the query in parse, otherwise you'd need to use the global sort function provided by swift.

Berk Kaya Over a year ago

query.orderByAscending("doctorNames") is the solution :} Thanks a lot again.

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