pin_code_text_field

It's a Flutter widget for entering pin code. Suitable for use cases such as login and OTP.

Usage

Use this package as a library

1. Depend on it
   Add this to your package's pubspec.yaml file:

dependencies:
  pin_code_text_field: ^1.2.1

2. Install it
   You can install packages from the command line:
   with Flutter:

$ flutter packages get

Alternatively, your editor might support flutter packages get. Check the docs for your editor to learn more.

3. Import it
   Now in your Dart code, you can use:

import 'package:pin_code_text_field/pin_code_text_field.dart';

API

name	type	default	description
maxLength	int	4	The total length of pin number & the number of pin boxes.
hideCharacter	bool	false	Show or hide the pin code.
highlight	bool	false	highlight the focused pin box.
highlightColor	Color	Colors.black	Set color of the focused pin box.
pinBoxDecoration	BoxDecoration	ProvidedPinBoxDecoration._defaultPinBoxDecoration	Customization for the individual pin boxes. Check ProvidedPinBoxDecoration for possible options.
pinTextStyle	TextStyle		TextStyle for styling pin characters.
maskCharacter	String	"\u25CF"	Special character to mask the pin code. Will only work if hideCharacter is set to true.
pinBoxHeight	double	70.0	Height of pin boxes.
pinBoxWidth	double	70.0	Width of pin boxes.
onDone	void Function(String)		Callback when the max length of pin code is reached.
hasTextBorderColor	Color	Colors.black	Set color of pin box containing text.
pinTextAnimatedSwitcherTransition	Function(Widget child, Animation animation)		Animation of text appearing/disappearing, you can write your own or use a few presets: 1. PinCodeTextField.awesomeTransition 2. PinCodeTextField.defaultScalingTransition 3. PinCodeTextField.defaultRotateTransition
pinTextAnimatedSwitcherDuration	Duration	const Duration()	Duration of pinTextAnimatedSwitcherTransition. Check ProvidedPinBoxTextAnimation for possible options.
errorBorderColor	Color	Colors.red	Highlight all textboxes to this color if hasError is set to true
onTextChange	Function(String)		callback that returns a text on input
hasError	bool	false	set all border color to errorBorderColor
autofocus	bool	false	Autofocus on view entered
wrapAlignment	WrapAlignment	WrapAlignment.start	Alignment of the wrapped pin boxes
pinCodeTextFieldLayoutType	PinCodeTextFieldLayoutType	PinCodeTextFieldLayoutType.NORMAL	Auto adjust width with PinCodeTextFieldLayoutType.AUTO_ADJUST_WIDTH, wrap the pin box row with PinCodeTextFieldLayoutType.WRAP

Example

class MyHomePageState extends State<MyHomePage> {
  TextEditingController controller = TextEditingController();
  String thisText = "";
  int pinLength = 4;

  bool hasError = false;
  String errorMessage;


  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Pin Code Text Field Example"),
      ),
      body: Container(
        child: SingleChildScrollView(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: <Widget>[
              Padding(
                padding: const EdgeInsets.only(bottom: 60.0),
                child: Text(thisText, style: Theme.of(context).textTheme.title),
              ),
              PinCodeTextField(
                autofocus: false,
                controller: controller,
                hideCharacter: true,
                highlight: true,
                highlightColor: Colors.blue,
                defaultBorderColor: Colors.black,
                hasTextBorderColor: Colors.green,
                maxLength: pinLength,
                hasError: hasError,
                maskCharacter: "?",

                onTextChanged: (text) {
                  setState(() {
                    hasError = false;
                  });
                },
                onDone: (text){
                  print("DONE $text");
                },
                pinCodeTextFieldLayoutType: PinCodeTextFieldLayoutType.AUTO_ADJUST_WIDTH,
                wrapAlignment: WrapAlignment.start,
                pinBoxDecoration: ProvidedPinBoxDecoration.underlinedPinBoxDecoration,
                pinTextStyle: TextStyle(fontSize: 30.0),
                pinTextAnimatedSwitcherTransition: ProvidedPinBoxTextAnimation.scalingTransition,
                pinTextAnimatedSwitcherDuration: Duration(milliseconds: 300),
              ),
              Visibility(
                child: Text(
                  "Wrong PIN!",
                  style: TextStyle(color: Colors.red),
                ),
                visible: hasError,
              ),
              Padding(
                padding: const EdgeInsets.only(top: 32.0),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                  children: <Widget>[
                    MaterialButton(
                      color: Colors.blue,
                      textColor: Colors.white,
                      child: Text("+"),
                      onPressed: () {
                        setState(() {
                          this.pinLength++;
                        });
                      },
                    ),
                    MaterialButton(
                      color: Colors.blue,
                      textColor: Colors.white,
                      child: Text("-"),
                      onPressed: () {
                        setState(() {
                          this.pinLength--;
                        });
                      },
                    ),
                    MaterialButton(
                      color: Colors.blue,
                      textColor: Colors.white,
                      child: Text("SUBMIT"),
                      onPressed: () {
                        setState(() {
                          this.thisText = controller.text;
                        });
                      },
                    ),
                    MaterialButton(
                      color: Colors.red,
                      textColor: Colors.white,
                      child: Text("SUBMIT Error"),
                      onPressed: () {
                        setState(() {
                          this.hasError = true;
                        });
                      },
                    ),
                  ],
                ),
              )
            ],
          ),
        ),
      ),
    );
  }
}

Wishlist

1. Localization (L-R, R-L)
2. Highlight animation
3. Pin Box animation

GitHub

https://github.com/LiewJunTung/pin_code_text_field