Have a nice day, guys!
I have a Flutter source code using Firebase for Phone Authentication when users signup/signin. But users have to wrire full phone number with country code. It's annoyed!
My app for Vietnam with country code is +84 only. Length of Vietnamese phone number is 10.
I want +84 to be default country code and users write their standard phone number only (example 0912345678).
So please tell me what files I have to edit in this source code to make default country code before phone number in number field.
Thank you very much!
Solution 1: Xetoo
Try below code:
TextFormField( inputFormatters: [ FilteringTextInputFormatter.deny(RegExp(r'[+]')), ], )