How to manage keyboard when there are UITextFields in UITableView using swift? - ios

Question

I am trying to find a way to avoid keyboard to not block selected UITextField in dynamic UITableViews.
I am aware this is a common issue and there are a lot of answers to this. However, answers I found are either in Obj-C or not involving dynamic UITableView.
My table view being has its own UITableViewCell so UITextFields are connected to it.
Also, I want to refresh the cell when UITextField entry has been made. I can pass that info (I am guessing cell's IndexPath.row?) to the UIViewController and have it listen to change and apply reload cell method?
Here is the related code I have:
class favCell: UITableViewCell, UITextFieldDelegate {
#IBOutlet weak var deciPadField: UITextField!
#objc func doneClicked(){
updateTotalWorth()
deciPadField.resignFirstResponder()
deciPadField.endEditing(true)
}
func textFieldDidBeginEditing(_ textField: UITextField) {
deciPadField.becomeFirstResponder()
}
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
let currentString: NSString = (textField.text ?? "") as NSString
let newString = currentString.replacingCharacters(in: range, with: string)
return newString.count <= 10
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
updateTotalWorth()
deciPadField.resignFirstResponder()
return true
}
private func textViewDidEndEditing(_ textView: UITextView) {
updateTotalWorth()
deciPadField.endEditing(true)
}
}
UPDATE:
If I can access my ViewControllers view from UITableViewCell, below code will do the trick:
func animateTextField(textField: UITextField, up: Bool) {
let movementDistance:CGFloat = -130
let movementDuration: Double = 0.3
var movement:CGFloat = 0
if up {
movement = movementDistance
} else {
movement = -movementDistance
}
UIView.beginAnimations("animateTextField", context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(movementDuration)
// Below line giving error, could not find the view. My ListVC.view should be referred to.
self.view.frame = self.view.frame.offsetBy(dx: 0, dy: movement)
UIView.commitAnimations()
}
func textFieldDidBeginEditing(textField: UITextField) {
self.animateTextField(textField: textField, up:true)
}
func textFieldDidEndEditing(textField: UITextField) {
self.animateTextField(textField: textField, up:false)
}
Thank you!

Answer 1

Well I finally figured out how to solve this. I implemented this answer: https://stackoverflow.com/a/41040630/4441676
Here is the solved code:
Inside ViewController's ViewDidLoad added two observers as below:
// Notification Observers
NotificationCenter.default.addObserver(self, selector: #selector(ListVC.keyboardWillShow(notification:)), name: Notification.Name.UIKeyboardDidShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(ListVC.keyboardWillHide(notification:)), name: Notification.Name.UIKeyboardDidHide, object: nil)
And added related two functions:
#objc func keyboardWillShow(notification: Notification) {
if let keyboardHeight = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue.height {
tableView.contentInset = UIEdgeInsetsMake(0, 0, keyboardHeight, 0)
}
}
#objc func keyboardWillHide(notification: Notification) {
UIView.animate(withDuration: 0.2, animations: {
// For some reason adding inset in keyboardWillShow is animated by itself but removing is not, that's why we have to use animateWithDuration here
self.tableView.contentInset = UIEdgeInsetsMake(0, 0, 0, 0)
})
}
In the UITableViewCell where UITextFields are connected, simply implement UITextField Delegate and add related Notification.posts when keyboard will show/hide:
deciPadField.delegate = self
func textFieldDidBeginEditing(_ textField: UITextField) {
NotificationCenter.default.post(name: Notification.Name.UIKeyboardDidShow, object: self)
}
func textFieldDidEndEditing(_ textField: UITextField) {
NotificationCenter.default.post(name: Notification.Name.UIKeyboardDidHide, object: self)
}
I have inputAccessoryView, so dismissing keyboard handled via following:
// Decipad config for adding Done button above itself
let toolBar = UIToolbar()
toolBar.sizeToFit()
let flexiableSpace = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: nil, action: nil)
let doneButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.done, target: self, action: #selector(self.doneClicked))
toolBar.setItems([flexiableSpace, doneButton], animated: false)
#objc func doneClicked(){
updateTotalWorth()
deciPadField.resignFirstResponder()
deciPadField.endEditing(true)
}
Hope this would help for someone else.