iOS keyboard hides a UITextField - swift

Question

When I press on a UITextField that is on the lower part of the screen, it is hidden by the keyboard.
What I wanted to do is moving up the view, with the standard iOS animation, reaching the UITextField that in which I am inserting some text.
I am developing the app in Swift 5 (Xcode 10.2)
The result that I have reached is that now I can move the view (a little earlier than desired) but the view moves every time I press on a UITextField, not only the one that will be hided by the keyboard.
class ViewController: UIViewController {
deinit {
NotificationCenter.default.removeObserver(self)
}
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(notification:)), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(notification:)), name: UIResponder.keyboardWillHideNotification, object: nil)
}
#objc func keyboardWillShow(notification: NSNotification) {
guard let userInfo = notification.userInfo else {
return
}
guard let keyboardSize = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else {
return
}
let keyboardFrame = keyboardSize.cgRectValue
if self.view.frame.origin.y == 0 {
self.view.frame.origin.y -= keyboardFrame.height
}
}
#objc func keyboardWillHide(notification: NSNotification) {
guard let userInfo = notification.userInfo else {
return
}
guard let keyboardSize = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else {
return
}
let keyboardFrame = keyboardSize.cgRectValue
if self.view.frame.origin.y != 0 {
self.view.frame.origin.y += keyboardFrame.height
}
}
}
The result that I want to obtain is that if the user presses on a UITextField that will be hided by the keyboard, then, a little bit after the keyboard appeared, the view is moved up until the user can see the UITextField that has pressed.
I've searched a long for a solution to this problem but all others that I've seen seems outdated or not doing what I'm trying to achieve.

Answer 1

you can try by taking scrollview :
import UIKit
class ViewController: UIViewController {
#IBOutlet var scrollView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
NotificationCenter.default.addObserver(self,selector:#selector(self.keyboardWillShow),name:UIResponder.keyboardDidShowNotification, object: nil)
NotificationCenter.default.addObserver(self,selector: #selector(self.keyboardWillHide),name:UIResponder.keyboardDidHideNotification, object: nil)
}
#objc func keyboardWillShow(notification: Notification) {
guard let userInfo = notification.userInfo,
let frame = (userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue
else{
return
}
let contentInset = UIEdgeInsets(top: 0, left: 0, bottom: frame.height, right: 0)
scrollView.contentInset = contentInset
}
#objc func keyboardWillHide(notification: Notification)
{
scrollView.contentInset = UIEdgeInsets.zero
}
}