How to fix position of UIView when keyboard moved up? - ios

Question

How do I fix the position of UIView with image and label when the keyboard is moved up?
I made a code to move up my textField when the keyboard shows, but instead this moves everything.
func textFieldDidEndEditing(_ textField: UITextField) {
moveTextField(textField: rasstoyanietextField, moveDistance: -215, up: false)
}
func textFieldDidBeginEditing(_ textField: UITextField) {
moveTextField(textField: rasstoyanietextField, moveDistance: -215, up: true)
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
rasstoyanietextField.resignFirstResponder()
return true
}
func moveTextField(textField: UITextField, moveDistance: Int, up: Bool){
let moveDuration = 0.1
let movement: CGFloat = CGFloat(up ? moveDistance : -moveDistance)
UIView.beginAnimations("animateTextField", context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(moveDuration)
self.view.frame = self.view.frame.offsetBy(dx: 0, dy: movement)
UIView.commitAnimations()
}
How could I fix it?

Answer 1

Because you move whole view, instead of textview only. Change line:
self.view.frame = self.view.frame.offsetBy(dx: 0, dy: movement)
with:
textField.frame = textField.frame.offsetBy(dx: 0, dy: movement)

Answer 2

Add keybaord observers
NotificationCenter.default.addObserver(
self,
selector: #selector(handleKeyboardDidShow),
name: NSNotification.Name.UIKeyboardDidShow,
object: nil)
NotificationCenter.default.addObserver(
self,
selector: #selector(handleKeyboardWillHide),
name:NSNotification.Name.UIKeyboardWillHide,
object: nil)
I think it's better to use scrollviews in viewControllers that have textfeilds/textViews to move up all items when showing but here you may Hook the bottom constraint of the textfeild or it's superview and drag it as IBOutlet and do this
#objc func handleKeyboardDidShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
self.textFeilfBottomCon.constant = -1 * keyboardSize.height
UIView.animate(withDuration: 0.5, animations: {
self.view.layoutIfNeeded()
})
}
}
#objc func handleKeyboardWillHide(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
self.textFeilfBottomCon.constant = 0
UIView.animate(withDuration: 0.5, animations: {
self.view.layoutIfNeeded()
})
}
}