How to change a variable UITextView after clicking the button? - swift

Question

I create UITextView with a random tag and text, but it is created with one variable, is it possible to update the variable after creation UITextView (by clicking the add button)? Maybe add a random number to it, for example newText1, newText2.. etc.
So that the next UITextView is already created with a new variable?
P.S Sorry, if the question is silly, I just recently started to study Swift
#IBOutlet weak var addTextButton: UIButton!
#IBOutlet weak var StoriesView: UIView!
var newText = UITextView()
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func addTextButton(_ sender: Any) {
let maxNumber = 10000
let i = Int(arc4random_uniform(UInt32(maxNumber)))
newText = UITextView(frame: CGRect(x: self.StoriesView.frame.origin.x + 40, y: self.StoriesView.frame.origin.y + 40, width: 380, height: 80))
self.StoriesView.addSubview(newText)
newText.font = UIFont(name: "Verdana", size: 11)
newText.text = "TAP TO EDIT #\(i)"
newText.sizeToFit()
newText.textColor = UIColor.black
newText.backgroundColor = UIColor.clear
newText.tag = i
newText.isEditable = true
newText.isSelectable = true
newText.isUserInteractionEnabled = true
newText.allowsEditingTextAttributes = true
newText.translatesAutoresizingMaskIntoConstraints = true
newText.enablesReturnKeyAutomatically = true
newText.delegate = self
}
UPD:
let fontToolbar = UIToolbar(frame:CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 50))
fontToolbar.barStyle = .default
fontToolbar.items = [
UIBarButtonItem(title: "Green", style: .plain, target: self, action: #selector(greenColor)),
UIBarButtonItem(title: "Blue", style: .plain, target: self, action: #selector(blueColor)),
UIBarButtonItem(title: "Red", style: .plain, target: self, action: #selector(redColor)),
UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil),
UIBarButtonItem(title: "Close Keyboard", style: .plain, target: self, action: #selector(dismissKeyboard))]
fontToolbar.sizeToFit()
newText.inputAccessoryView = fontToolbar
in the toolBar above the keyboard I have buttons, here we change the color
#objc func redColor() {
newText.textColor = UIColor.red}
#objc func blueColor() {
newText.textColor = UIColor.blue}
#objc func greenColor() {
newText.textColor = UIColor.green}
So the color changes only in the newly created UITextView

Answer 1

On click of button, create a new texView and assign it a tag value. Once it is added, update the value of i to +1, so that every textView added has a new tag value.
var i = 1
var newText = UITextView()
#IBAction func addTextButton(_ sender: Any) {
newText = UITextView(frame: CGRect(x: self.StoriesView.frame.origin.x + 40, y: self.StoriesView.frame.origin.y + 40, width: 380, height: 80))
self.StoriesView.addSubview(newText)
newText.font = UIFont(name: "Verdana", size: 11)
newText.text = "TAP TO EDIT #\(i)"
newText.sizeToFit()
newText.textColor = UIColor.black
newText.backgroundColor = UIColor.clear
newText.tag = i
newText.isEditable = true
newText.isSelectable = true
newText.isUserInteractionEnabled = true
newText.allowsEditingTextAttributes = true
newText.translatesAutoresizingMaskIntoConstraints = true
newText.enablesReturnKeyAutomatically = true
newText.delegate = self
//increment i
i+=1
}
then you can access your textField via tag values like this:
if let textView = self.StoriesView.viewWithTag(i) as? UITextView {
// textView.text = "change it"
}
UPDATE:
Add textView Delegate method, and once a textView starts editing, change the newText value to the currently editing textView
class ViewController : UIViewController, UITextViewDelegate {
func textViewDidBeginEditing(_ textView: UITextView) {
newText = textView
}
}

Answer 2

I have modified your code a bit to have new UITextView object with button click
import UIKit
class ScannerViewController: UIViewController, UITextViewDelegate {
#IBOutlet weak var StoriesView: UIView!
#IBOutlet weak var addTextButton: UIButton!
var yposition: CGFloat!
var textFieldTag: [Int]! = []
override func viewDidLoad() {
super.viewDidLoad()
yposition = 20
}
#IBAction func addTextButton(_ sender: Any) {
let xposition = self.StoriesView.frame.origin.x
let maxNumber = 10000
let i = Int(arc4random_uniform(UInt32(maxNumber)))
textFieldTag.append(i)
let newText = UITextView(frame: CGRect(x: xposition , y: yposition , width: 380, height: 40))
self.StoriesView.addSubview(newText)
newText.font = UIFont(name: "Verdana", size: 11)
newText.text = "TAP TO EDIT #\(i)"
newText.sizeToFit()
newText.textColor = UIColor.black
newText.backgroundColor = UIColor.yellow
newText.tag = i
newText.isEditable = true
newText.isSelectable = true
newText.isUserInteractionEnabled = true
newText.allowsEditingTextAttributes = true
newText.translatesAutoresizingMaskIntoConstraints = true
newText.enablesReturnKeyAutomatically = true
newText.delegate = self
yposition = yposition + 45
}
#IBAction func accessTextFields(_ sender: Any) {
//access all text fields
for tag in textFieldTag {
if let textField = self.StoriesView.viewWithTag(tag) as? UITextView {
//change properties here
textField.backgroundColor = .cyan
}
}
//access specific text fields
if let textField = self.StoriesView.viewWithTag(textFieldTag.first!) as? UITextView {
//change properties here
textField.backgroundColor = .orange
}
if let textField = self.StoriesView.viewWithTag(textFieldTag[textFieldTag.count - 1]) as? UITextView {
//change properties here
textField.backgroundColor = .green
}
}
}
It will have an output as this!!