Why is Optional(“Text”) - Swift

Question

I just started with Swift. So I created a simple application with a label, button and a text field. When you click the button, the app has to change the label with the text

Answer 1

So the problem here is that the textField's text is an optional, that you have to unwrap for using it.

Just add an ! to textField.text like this:

textLabel.text = "Hi \(textField.text!)"

Your output will now be Hi TextOfTextField

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You have a few safer options to unwrap your optionals:

1. nil coalescing operator: ??
   This will use either textField.text, or, if that's nil, use the other value provided, "?" in this case

   textLabel.text = "Hi \(textField.text ?? "?")"
   

2. if let statement:
   Note that this will only update your text field's text, if it's not nil. You could provide an else statement to deal with that.

   if let text = textField.text {
       textField.text = "Hi \(text)"
   }
   

3. guard let statement:
   This works similarly like the if let statement, except that your function will end after the statement.

   guard let text = textField.text else { return }
   textField.text = "Hi \(text)"
   

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Hope this helps :)