trying to make picker view input for several textfields separately - ios

Question

I'm making a GPA calculator using swift and I've run into some problems. I created a picker view with all the letter grades (A to F). I've put 7 text fields (one for each course). I want the user to tap on a textfield and the pickerview should appear, and the grade selected would appear in the textfield. I've managed to do that for the first textfield but I dont know how to write the code that allows me to pick the grade for each textfield. I've tried different methods but I always end up changing the first textfield only.
Any help is appreciated :-)
Here is my code (gradeOne is a textfield for course 1, gradeTwo for course 2, etc.):
import UIKit
class GPA: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
#IBOutlet var gradeOne: UITextField!
#IBOutlet var gradeTwo: UITextField!
//Grades array
var grades = ["A+/A (85-100)", "A- (80-84)", "B+ (77-79)", "B (73-76)", "B- (70-72)", "C+ (67-69)", "C (63-66)", "C- (60-62)", "D+ (57-59)", "D (53-56)", "D- (50-52)", "F (0-49)"]
//Grade 1 Picker
func numberOfComponentsInPickerView(gradePickerView: UIPickerView) -> Int {
return 1
}
func pickerView(gradePickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return grades.count
}
func pickerView(gradePickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return grades[row]
}
func pickerView(gradePickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
gradeOne.text = grades[row]
}
//Make keyboard disappear
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let gradePickerView = UIPickerView()
gradePickerView.delegate = self
gradeOne.inputView = gradePickerView
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(dismissKeyboard))
view.addGestureRecognizer(tap)
}
func dismissKeyboard() {
//Causes the view (or one of its embedded text fields) to resign the first responder status.
view.endEditing(true)
}
}

Answer 1

You should set gradePickerView as the inputView for all your textfields
gradeTwo.inputView = gradePickerView
gradeThree.inputView = gradePickerView
// set for rest of textfields
and then in your pickerView:didSelectRow: method you need to set the text to the active text field at the time. I suggest setting the active textfield using UITextFieldDelegate
var activeField: UITextField?
override func viewDidLoad() {
// Set VC as textfield's delegate
gradeTwo.delegate = self
gradeThree.delegate = self
// Set for rest of textfields
}
func textFieldShouldBeginEditing(textField: UITextField) -> Bool {
activeField = textField
}
func pickerView(gradePickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
activeField.text = grades[row]
}

Answer 2

Use the delegate for UITextField to set all inputviews to pickerView. Make sure you set delegate for all textfields
let gradePickerView = UIPickerView()
override func viewDidLoad() {
super.viewDidLoad()
// set delegates for all textfields
gradePickerView.delegate = self
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(dismissKeyboard))
view.addGestureRecognizer(tap)
}
func textFieldShouldBeginEditing(textField: UITextField) -> Bool {
textField.inputView = gradePickerView
}

Answer 3

I think you want to tap on 7 textfiel. Each time the pickerView will show. You picker a cell in pickerView and the textfiel(that you just tap) will show your select? If it's true. You should do fowllow this step:
1: Add tag to each textFiel: yourtextFiel.view.tag = 0 (or 1,2,3,4,...)
2: When show pickerView: Add pickerView.tag = yourtextFiel.view.tag
3: in fucion pickerView didSelectRow : get your textFiel's tag will show your selected: let mytag = pickerView.tag.
Find your textFiel with "mytag" and change your text
Googluck