How to remove and add items in uipickerview in swift 4.? - ios

Question

I have three text fields for which I am showing the same pickerview as drop down for choosing the values. So the condition is that I have 5 values in an array with values red, blue, green, yellow, black.
So the condition is
These three text fields cannot have same value. That is if for first textfield 1 if I choose red as value from picker the value " red " should be removed or disabled from picker view when I select textfield 2 or text field 3 .
And if I change the value of textfield 1 from red to black from picker view the value red which is disabled or removed should get added back to the pickerview when I click on textfield 2 or textfield 3.
The code which I am trying is:
import UIKit
class ViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate {
#IBOutlet weak var textFiled1: UITextField!
#IBOutlet weak var textFiled2: UITextField!
#IBOutlet weak var textFiled3: UITextField!
#IBOutlet weak var pickerView: UIPickerView!
var Array = ["Blue", "Green", "Red", "White", "Grey"]
var indexOfPicker = Int()
override func viewDidLoad() {
super.viewDidLoad()
pickerView.dataSource = self
pickerView.delegate = self
}
#IBAction func minusButton(_ sender: UIButton) {
if Array.count != 0 {
Array.remove(at: indexOfPicker)
pickerView.reloadAllComponents()
}
}
#IBAction func plusButton(_ sender: UIButton) {
if textFiled.text != "" {
Array.append(textFiled.text!)
pickerView.reloadAllComponents()
}
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return Array.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return Array[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
indexOfPicker = row
}
}

Answer 1

class ViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate, UITextFieldDelegate {
#IBOutlet weak var textFiled1: UITextField!
#IBOutlet weak var textFiled2: UITextField!
#IBOutlet weak var textFiled3: UITextField!
#IBOutlet weak var pickerView: UIPickerView!
var selectedTextField:UITextField?
var colorsArray = ["Blue", "Green", "Red", "White", "Grey"]
override func viewDidLoad() {
super.viewDidLoad()
textFiled1.delegate = self
textFiled2.delegate = self
textFiled3.delegate = self
pickerView.dataSource = self
pickerView.delegate = self
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
let tempArr = colorsArray.filter { ![textFiled1.text!,textFiled2.text!,textFiled3.text!].contains($0) }
return tempArr.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
let tempArr = colorsArray.filter { ![textFiled1.text!,textFiled2.text!,textFiled3.text!].contains($0) }
return tempArr[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
let tempArr = colorsArray.filter { ![textFiled1.text!,textFiled2.text!,textFiled3.text!].contains($0) }
self.selectedTextField?.text = tempArr[row]
pickerView.reloadAllComponents()
}
func textFieldDidBeginEditing(_ textField: UITextField) {
self.selectedTextField = textField
pickerView.reloadAllComponents()
}
}