Delegate protocol functions not triggered for UITextView - swift

Question

I have this swift file where I'm trying to create a custom class to handle placeholders for multiple text views on one page. I prefer a separate class because I think its cleaner to handle multiple views. Problem is, the functions textViewDidEndEditing and textViewDidBeginEditing are not being called when those events occur.
I've had it successfully work by setting the PostPage to the delegate, but I don't see how I could do that with multiple UITextViews.
This is my code:
import UIKit
class PostPage: UIViewController, UITextViewDelegate {
#IBOutlet weak var eventDescription: UITextView!
#IBOutlet weak var eventTitle: UITextView!
var placeholderShowing = true
override func viewDidLoad() {
super.viewDidLoad()
// Add a placeholder for the text
let ph_descr = PlaceHolderHandler(placeholderText: "Description", textBox: eventDescription)
eventDescription.delegate = ph_descr
let ph_title = PlaceHolderHandler(placeholderText: "Title", textBox: eventTitle)
eventTitle.delegate = ph_title
}
}
class PlaceHolderHandler: NSObject, UITextViewDelegate {
var placeholderShowing = true
var placeholderText = ""
required init(placeholderText: String, textBox: UITextView) {
super.init()
self.placeholderText = placeholderText
textBox.text = placeholderText
textBox.textColor = UIColor.lightGray
}
// MARK:- UITextViewDelegates
public func textViewDidBeginEditing(_ textView: UITextView) {
if self.placeholderShowing {
textView.text = ""
textView.textColor = UIColor.black
self.placeholderShowing = false
}
}
public func textViewDidEndEditing(_ textView: UITextView) {
if textView.text == "" {
textView.text = "Description"
textView.textColor = UIColor.lightGray
self.placeholderShowing = true
}
}
}
When I select either of the UITextViews, I'd like the corresponding function to be called, and have the text adjust accordingly.

Answer 1

You need to retain phDescr and phTitle as in your code they are local variables so get de-allocated end of viewDidLoad
import UIKit
class PostPage: UIViewController, UITextViewDelegate {
#IBOutlet weak var eventDescription: UITextView!
#IBOutlet weak var eventTitle: UITextView!
var placeholderShowing = true
var phDescr, phTitle:PlaceHolderHandler!
override func viewDidLoad() {
super.viewDidLoad()
// Add a placeholder for the text
phDescr = PlaceHolderHandler(placeholderText: "Description", textBox: eventDescription)
eventDescription.delegate = phDescr
phTitle = PlaceHolderHandler(placeholderText: "Title", textBox: eventTitle)
eventTitle.delegate = phTitle
}
}
also use camelCase to name variables
I've had it successfully work by setting the PostPage to the delegate, but I don't see how I could do that with multiple UITextView
Off course you can set the delegate for both to PostPage and to know which 1 is intact use
func textViewDidBeginEditing(_ textView: UITextView) {
if textView == eventDescription {
}
else { // eventTitle
}
}