I want to add listener and remove in dispose method to prevent memory leaks in my app. I am trying to add listener which will be fired when code_field is filled.
What ways are possible and how could I do it?
ConfirmCodeScreenState
import 'package:code_field/code_field.dart';
import 'package:flutter/material.dart';
class ConfirmCodeScreen extends StatefulWidget {
@override
_ConfirmCodeScreenState createState() => _ConfirmCodeScreenState();
}
class _ConfirmCodeScreenState extends State<ConfirmCodeScreen> {
final codeControl = InputCodeControl(inputRegex: '^[0-9]*');
@override
void initState() {
codeControl.addListener(() {
// there should be listener to subscribe
});
super.initState();
}
@override
void dispose() {
codeControl.removeListener(() {
// should be here
});
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: Container(
padding: EdgeInsets.symmetric(
horizontal: consts.APP_PADDING),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
InputCodeField(
control: codeControl,
count: 4,
inputType: TextInputType.number,
decoration: InputCodeDecoration(
focusColor: Colors.black,
color: Colors.black,
textStyle: TextStyle(
color: Colors.black, fontSize: 30)),
),
],
),
),
),
);
}
}
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