Problem with moving the view when the keyboard is open - ios

Question

I have a problem with the moving of text input and button when the keyboard is open. I am using the following code
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChange(notification:)), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChange(notification:)), name: UIResponder.keyboardWillChangeFrameNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChange(notification:)), name: UIResponder.keyboardWillHideNotification, object: nil)
}
deinit {
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillChangeFrameNotification, object: nil)
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillHideNotification, object: nil)
}
#objc func keyboardWillChange(notification: NSNotification) {
guard let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue else {
return
}
if notification.name == UIResponder.keyboardWillShowNotification || notification.name == UIResponder.keyboardWillChangeFrameNotification {
view.frame.origin.y = -keyboardSize.height
} else {
view.frame.origin.y = 0
}
}
The problem occurs when I start typing in the text field, here are images before: https://imgur.com/a/cbQbJzW and after: https://imgur.com/a/f1Nakrs
I am sorry about the language it of files don't say anything spacial.
I want to know why this happens, is it possible to be because I am using CocoaPods - YoshikoTextField in the grey text field ?
Thank you!

Answer 1

import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var backgroundScrollView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
// Do any additional setup after loading the view, typically from a nib.
}
#objc func keyboardWillShow(notification:NSNotification) {
adjustingHeight(true, notification: notification)
}
#objc func keyboardWillHide(notification:NSNotification) {
adjustingHeight(false, notification: notification)
}
func adjustingHeight(_ isShow:Bool, notification:NSNotification) {
let userInfo = notification.userInfo!
let keyboardFrame = (userInfo[UIResponder.keyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue
let changeInHeight = (keyboardFrame.height + 20) * (isShow ? 1 : -1)
backgroundScrollView.contentInset.bottom += changeInHeight
backgroundScrollView.scrollIndicatorInsets.bottom += changeInHeight
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
self.view.endEditing(true)
return true
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}