MaxDigitsFormatter class

A custom TextInputFormatter that limits the number of digits a user can input.

This formatter allows only numeric input and enforces a maximum number of digits. It strips out all non-digit characters and prevents further input once the limit is reached.

Parameters:

  • maxDigits: The maximum number of digits allowed in the input.

Usage:

TextField(
  keyboardType: TextInputType.number,
  inputFormatters: [MaxDigitsFormatter(10)],
)

This example restricts the input to a maximum of 10 digits.

Inheritance

Constructors

MaxDigitsFormatter(int maxDigits)
Creates a MaxDigitsFormatter with the specified maximum number of digits.

Properties

hashCode → int
The hash code for this object.
no setterinherited
maxDigits → int
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

formatEditUpdate(TextEditingValue oldValue, TextEditingValue newValue) → TextEditingValue
Called when text is being typed or cut/copy/pasted in the EditableText.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited