Keyboard move up and down - ios

Question

I have a loginView, inside that i have two textFields and a button. I have to move up the view while tapping on textField and move down the view when press the return key.
My problem is that it is working fine for all conditions but while tap on the one textField view is moving up but at same time when we go for next textField view is moving down.
import UIKit
class CheckFontIconView: UIViewController,UITextFieldDelegate {
var activeField: UITextField?
#IBOutlet weak var loginFieldsView: UIView!
#IBOutlet weak var label: UILabel!
#IBOutlet weak var mobileNo: UITextField!
#IBOutlet weak var textFieldPassword: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
mobileNo.delegate = self
textFieldPassword.delegate = self
registerForKeyboardNotifications()
}
#IBAction func btnLoginAction(_ sender: Any) {
}
deinit {
//NotificationCenter.default.removeObserver(self)
self.deregisterFromKeyboardNotifications()
}
func registerForKeyboardNotifications() {
//Adding notifies on keyboard appearing
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWasShown(notification:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillBeHidden(notification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
func deregisterFromKeyboardNotifications() {
//Removing notifies on keyboard appearing
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
func keyboardWasShown(notification: NSNotification) {
//Need to calculate keyboard exact size due to Apple suggestions
var info = notification.userInfo!
let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size
if self.activeField != nil {
self.loginFieldsView.frame.origin.y -= (keyboardSize?.height)!
}
}
func keyboardWillBeHidden(notification: NSNotification) {
//Once keyboard disappears, restore original positions
var info = notification.userInfo!
let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size
self.loginFieldsView.frame.origin.y -= (keyboardSize?.height)!
self.loginFieldsView.endEditing(true)
}
func textFieldDidBeginEditing(_ textField: UITextField) {
self.activeField = textField
}
func textFieldDidEndEditing(_ textField: UITextField) {
self.activeField = nil
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
activeField?.resignFirstResponder()
return true
}
}

Answer 1

Once try with scrollView,I hope it will help you.
Use a scroll view to moving text field up and down.
Making Up
Make a #IBOutlet weak var scroller: UIScrollView!;
Under textFieldDidBeginEditing:textField method
Create a CGPoint with x: 0 and y texfield.frame.origin.y
And then start moving the scroller with setContentOffset:animated function.(Parameter will be your CGPoint and a boolean value true).
Making Down
Under textFieldDidEndEditing:textField set your scroller to CGPoint.zero with same setContentOffset:animated function.
*And your textFieldShouldReturn:textField should be resignFirstResponder or to next textField.
Please let me know if having any problem on this.

Answer 2

Thanks for ask question...
Use TPKeyboard to achieve above functionality then no manage this kind of stuff (Automatically manage by TPKeyboard)...
Update:
I think you have done some mistake in given below code...
func textFieldDidEndEditing(_ textField: UITextField) {
self.activeField = nil
}
You have to DEBUG and identify exact issue..
Happy coding...

Answer 3

I made the simple code for your problem. It is not good but you can refer with that idea for fix your problem.
import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
var activeField: UITextField?
#IBOutlet weak var loginFieldsView: UIView!
#IBOutlet weak var label: UILabel!
#IBOutlet weak var mobileNo: UITextField!
#IBOutlet weak var textFieldPassword: UITextField!
var originalHeight:CGFloat!
override func viewDidLoad() {
super.viewDidLoad()
mobileNo.delegate = self
textFieldPassword.delegate = self
originalHeight = self.loginFieldsView.frame.origin.y
registerForKeyboardNotifications()
}
#IBAction func btnLoginAction(_ sender: Any) {
}
deinit {
//NotificationCenter.default.removeObserver(self)
self.deregisterFromKeyboardNotifications()
}
func registerForKeyboardNotifications() {
//Adding notifies on keyboard appearing
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWasShown(notification:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillBeHidden(notification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
func deregisterFromKeyboardNotifications() {
//Removing notifies on keyboard appearing
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
func keyboardWasShown(notification: NSNotification) {
//Need to calculate keyboard exact size due to Apple suggestions
var info = notification.userInfo!
let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size
if self.activeField != nil {
if self.loginFieldsView.frame.origin.y == originalHeight {
self.loginFieldsView.frame.origin.y -= (keyboardSize?.height)!
}
}
}
func keyboardWillBeHidden(notification: NSNotification) {
//Once keyboard disappears, restore original positions
var info = notification.userInfo!
let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size
if originalHeight > self.loginFieldsView.frame.origin.y {
self.loginFieldsView.frame.origin.y += (keyboardSize?.height)!
}
self.loginFieldsView.endEditing(true)
}
func textFieldDidBeginEditing(_ textField: UITextField) {
self.activeField = textField
}
func textFieldDidEndEditing(_ textField: UITextField) {
self.activeField = nil
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
activeField?.resignFirstResponder()
return true
}
}

Answer 4

Just one change hold your view old frame in a variable and assign it again to your view when keyboard disappear.
import UIKit
class CheckFontIconView: UIViewController,UITextFieldDelegate {
var activeField: UITextField?
#IBOutlet weak var loginFieldsView: UIView!
#IBOutlet weak var label: UILabel!
#IBOutlet weak var mobileNo: UITextField!
#IBOutlet weak var textFieldPassword: UITextField!
var previousFrame : CGRect!
override func viewDidLoad() {
super.viewDidLoad()
previousFrame=self.loginFieldsView.frame
mobileNo.delegate = self
textFieldPassword.delegate = self
registerForKeyboardNotifications()
}
func keyboardWasShown(notification: NSNotification) {
//Need to calculate keyboard exact size due to Apple suggestions
var info = notification.userInfo!
let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size
if self.activeField != nil {
self.loginFieldsView.frame.origin.y = previousFrame.origin.y-(keyboardSize?.height)!
}
}
func keyboardWillBeHidden(notification: NSNotification) {
//Once keyboard disappears, restore original positions
/*var info = notification.userInfo!
let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size*/
self.loginFieldsView.frame = previousFrame
//self.loginFieldsView.endEditing(true)
}
func textFieldDidBeginEditing(_ textField: UITextField) {
self.activeField = textField
}
func textFieldDidEndEditing(_ textField: UITextField) {
self.activeField = nil
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
activeField?.resignFirstResponder()
return true
}
}