Flutter sharedpreferences delete key

To delete a key from SharedPreferences in Flutter, you can use the remove() method. Firstly, import the necessary package:

<script>
import 'package:shared_preferences/shared_preferences.dart';
</script>

Then, you can remove a specific key by calling the remove() method as shown below:

<script>
void deleteKey() async {
  SharedPreferences preferences = await SharedPreferences.getInstance();
  preferences.remove('your_key');
}
</script>

In the code snippet above, we first obtain an instance of SharedPreferences by calling getInstance() method. After that, we use the obtained preferences object to delete a specific key by calling remove() method and passing the key as a parameter (replace 'your_key' with the actual name of the key you want to delete).

Here’s an example of how you can use the deleteKey() function in a Flutter application:

<script>
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  void deleteKey() async {
    SharedPreferences preferences = await SharedPreferences.getInstance();
    preferences.remove('your_key');
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Delete Key Example'),
        ),
        body: Center(
          child: RaisedButton(
            onPressed: deleteKey,
            child: Text('Delete Key'),
          ),
        ),
      ),
    );
  }
}
</script>

The code above sets up a simple Flutter application with a button. When the button is pressed, it calls the deleteKey() function which deletes the specified key from the SharedPreferences. You can replace 'your_key' with the actual key you want to delete.