Save the last letter when typing in a textField - swift

Question

I have this function in my application:
func typingName(textField:UITextField){
if let typedText = textField.text {
tempName = typedText
print(tempName)
}
}
In viewDidLoad() I have written this:
textField.addTarget(self, action: #selector(typingName), for: .editingChanged)
All works good, but I want to save only the letter typed by the user.
With this function if I write "hello" it prints:
"h"
"he"
"hel"
"hell"
"hello".
Instead, I want to have this:
"h"
"e"
"l"
"l"
"o".

Answer 1

If you want to get last character which user entered with keyboard.
You can detect it with delegate method of UITextField as shown in below code:
import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var tfName: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
//Need to confirm delegate for textField here.
tfName.delegate = self
}
//UITextField Delegate Method
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
//This will print every single character entered by user.
print(string)
return true
}
}

Answer 2

For any Swift String, You could get the latest letter from a string like this:
let myString = "Hello, World"
let lastCharacter = myString.characters.last // d
Note that the data type of lastCharacter is Character? (optional character), you might want to do it as optional binding:
let myString = "Hello, World"
if let lastCharacter = myString.characters.last {
print(lastCharacter) // d
}
Since you are listening to editingChanged event, all you have to do in your typingName function is:
func typingName(textField:UITextField){
if let typedText = textField.text {
tempName = typedText
print(tempName)
if let lastCharacter = tempName.characters.last {
print(lastCharacter)
}
}
}