I have a TextField for username and want to include single quote (') within the characters such as (O'Neal Nickel). Here is my regular expression for allowing letters, space, full stop (.), hyphens (-), and single quote (').
WhitelistingTextInputFormatter(RegExp('[a-zA-Z0-9 \'.-]'))
The regex is working for Android but not for iOS. In iOS, the TextField is not allowing single quotes. Did I get the regex right?