UIPickerView for each text field with different arrays (Swift/Firebase)

Question

I am trying to create a form in which each text field has a UIPickerView which the user can use to select the option needed. I need a to use a different array of information

Answer 1

Your code is almost right. I would just store a class attribute with the UIPickerView so you can reload the components upon textField editing status change. For that purpose, you have also to set the textField delegates.

Here a working example with the adjustments I just commented:

import UIKit

class ViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate, UITextFieldDelegate {


    @IBOutlet weak var gameTextField: UITextField!
    @IBOutlet weak var activityTextField: UITextField!
    @IBOutlet weak var consoleTextField: UITextField!
    @IBOutlet weak var skillTextField: UITextField!
    @IBOutlet weak var communicationTextField: UITextField!
    @IBOutlet weak var lfglfmTextField: UITextField!

    var games = ["Assassin's Creed Origins", "Battlefield 1", "Call of Duty: Advanced Warfare", "Call of Duty: Black Ops III", "Call of Duty: Ghosts", "Call of Duty: Infinite Warfare", "Call of Duty: Modern Warfare Remastered", "Call of Duty: WWII", "Destiny", "Destiny 2", "Fifa 16", "Fifa 17", "Fifa 18", "Rocket League"]
    var console = ["Xbox One", "Xbox 360", "Playstation 4", "Playstation 3"]
    var skill = ["Achiever", "Explorer", "Killer", "Socializer"]
    var communication = ["Mic", "No Mic"]
    var lfglfm = ["LFG", "LFM"]

    var itemSelected = ""

    weak var pickerView: UIPickerView?

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.

        //remove margin / padding from textview
        //        self.descriptionTextView.textContainerInset = .zero
        //        self.descriptionTextView.contentInset = UIEdgeInsetsMake(0, -5, 0, 0)

        //allow tap on screen to remove text field input from screen
        self.view.addGestureRecognizer(UITapGestureRecognizer(target: self.view, action: #selector(UIView.endEditing(_:))))

        //UIPICKER
        let pickerView = UIPickerView()
        pickerView.delegate = self
        pickerView.dataSource = self

        gameTextField.delegate = self
        consoleTextField.delegate = self
        skillTextField.delegate = self
        communicationTextField.delegate = self
        lfglfmTextField.delegate = self

        gameTextField.inputView = pickerView
        consoleTextField.inputView = pickerView
        skillTextField.inputView = pickerView
        communicationTextField.inputView = pickerView
        lfglfmTextField.inputView = pickerView

        //It is important that goes after de inputView assignation
        self.pickerView = pickerView

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func textFieldDidBeginEditing(_ textField: UITextField) {
        self.pickerView?.reloadAllComponents()
    }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        if gameTextField.isFirstResponder{
            return games.count
        }else if consoleTextField.isFirstResponder{
            return console.count
        }else if skillTextField.isFirstResponder{
            return skill.count
        }else if communicationTextField.isFirstResponder{
            return communication.count
        }else if lfglfmTextField.isFirstResponder{
            return lfglfm.count
        }
        return 0
    }

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

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        if gameTextField.isFirstResponder{
            return games[row]
        }else if consoleTextField.isFirstResponder{
            return console[row]
        }else if skillTextField.isFirstResponder{
            return skill[row]
        }else if communicationTextField.isFirstResponder{
            return communication[row]
        }else if lfglfmTextField.isFirstResponder{
            return lfglfm[row]
        }
        return nil
    }

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        if gameTextField.isFirstResponder{
            let itemselected = games[row]
            gameTextField.text = itemselected
        }else if consoleTextField.isFirstResponder{
            let itemselected = console[row]
            consoleTextField.text = itemselected
        }else if skillTextField.isFirstResponder{
            let itemselected = skill[row]
            skillTextField.text = itemselected
        }else if communicationTextField.isFirstResponder{
            let itemselected = communication[row]
            communicationTextField.text = itemselected
        }else if lfglfmTextField.isFirstResponder{
            let itemselected = lfglfm[row]
            lfglfmTextField.text = itemselected
        }
    }



    /*
     // MARK: - Navigation

     // In a storyboard-based application, you will often want to do a little preparation before navigation
     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
     // Get the new view controller using segue.destinationViewController.
     // Pass the selected object to the new view controller.
     }
     */

}

EDITED:

You don't need the updatePicker method. It does nothing indeed. I've deleted the createPostTapped method for the purpose of this simple example.