Shared_Preferences SQFlite

最新推荐文章于 2025-02-17 16:51:37 发布

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本文介绍如何使用Flutter中的Shared_Preferences插件进行简单的数据存储。通过一个示例展示了如何使用SharedPreferences进行计数器数值的读写操作。

In Flutter, access this functionality using the Shared_Preferences plugin. This plugin wraps the functionality of both Shared Preferences and NSUserDefaults (the iOS equivalent).

In Flutter, access this functionality using the SQFlite plugin

import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';

void main() {
  runApp(
    MaterialApp(
      home: Scaffold(
        body: Center(
          child: ElevatedButton(
            onPressed: _incrementCounter,
            child: Text('Increment Counter'),
          ),
        ),
      ),
    ),
  );
}

_incrementCounter() async {
  SharedPreferences prefs = await SharedPreferences.getInstance();
  int counter = (prefs.getInt('counter') ?? 0) + 1;
  print('Pressed $counter times.');
  prefs.setInt('counter', counter);
}