Regex with single quote (') not validating single quote [closed]

Question

I'm using the following regex to validate the name:

> ^[a-zA-Z]{1}[a-zA-Z.' ]{1,20}$

The single quote is mentioned in the second range. However, when I validate a string against this regex, the single quote (') invalidates the match. Here's my code:

let nameRegEx = "^[a-zA-Z]{1}[a-zA-Z.' ]{1,21}$"
let nameTest = NSPredicate(format:"SELF MATCHES %@", nameRegEx)
let isNameValid = nameTest.evaluate(with: name)

I've tried \' but no use.

Answer 1

Turns out textField.text returns ’ and not '. Changing the character resolved the issue.