How to prevent entering numbers in Flutter TextFormField?

Question

I am developing an application with Flutter. I put TextFormField. I want to prevent entering numbers in this TextFormField. How can I do that?

On what platforms does your app run (iOS, Android, browser, macOS etc) ? — Adelin Preda
– Adelin Preda, Commented Sep 14, 2022 at 22:06

Sergio Clemente · Accepted Answer · 2022-09-14 14:56:29Z

5

Try this:

TextFormField(
 inputFormatters: <TextInputFormatter>[
      FilteringTextInputFormatter.deny(RegExp('[0-9]')),
  ], 
),

answered Sep 14, 2022 at 14:56

Sergio Clemente

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BLKKKBVSIK · Accepted Answer · 2022-09-14 14:53:12Z

3

You can use the validator argument to create a callback if the user input a number. You can also add the keyboardType argument to limit the user to only text with the value TextInputType.text

answered Sep 14, 2022 at 14:53

BLKKKBVSIK

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Comments

Balaji · Accepted Answer · 2022-09-14 14:55:41Z

1

   inputFormatters: [
                      FilteringTextInputFormatter.deny(RegExp("[0-9]")),
                    ],

You need to add this

answered Sep 14, 2022 at 14:55

Balaji

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