Swift 5 Custom Textfield Delegate not working - ios

Question

Ever since I updated my Xcode and project to Swift 5,
I have this incredibly weird issue with specific textfields.
These text fields have a custom class to allow a response to a swipe action. They also have a special response to a standard touch. When the text field is touched, the textFieldShouldBeginEditing function suppresses the keyboard raise and instead launches a custom pull out value selection menu.
All was working perfectly until the update, where, whenever I start my Xcode up (after a day or two) and load my app, the textFieldShouldBeginEditing for these fields is never called!
What cures them (riduculously) is going to each View Controller that has one of these custom textfields - and making a single stroke edit to the page.
Then, when I reload, the textfields on that particular view are good again.
But the problem happens all over again, a few days later after I reload the app.
And I can't seem to replicate the problem by merely shutting down Xcode or even my computer. It seems it has to be shut down for some random amount of time or something.
...I don't know what causes this.
One other point - is that the IBOutlets for the custom selection pane is on a parent Class that is parent to all of these view controllers.
It would take a ton of writing to distribute all of the parent codes to all of the children view controllers.
func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
var boolVal = true
switch textField.tag {
case 11: boolVal = false; launchSelection(textField)
case 12: boolVal = false; launchSelection(textField)
default: boolVal = true; shutThatStupidSideBar()
}
textFieldTag = textField.tag
return boolVal
}
func launchSelection(_ tf:UITextField) {
selectionPane.textfield = tf
switch tf.tag {
case 11: selectionPane.tableData = lm.retreiveList("provider") //11 = Owner
case 12: selectionPane.tableData = lm.retreiveList("\(currentSettings.defUnitsStrand)GaugeStrand") //12 = Strand Gauge
default: break
}
toggleSideBar()
}

Answer 1

Check UITextField delegate to UIViewController in storyboard
Add UITextFieldDelegate to viewController code like This:
class ViewController: UIViewController, UITextFieldDelegate
Use this sample code:
func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
print("Test")
return true
}